Category
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AnimalsTranscript
00:00:00you
00:00:30you
00:01:00you
00:01:15Jai Hind friends, welcome to your own family. How are you all, please tell us.
00:01:20We are fine, we are enjoying.
00:01:24How are you all?
00:01:30How was your Janmashtami?
00:01:33Did you have fun?
00:01:37Very good, very good.
00:01:39Radhe Radhe to everyone.
00:01:45Come on, my brother, very good, very good.
00:01:47Everyone is live.
00:01:49I hope you will be healthy, happy, happy, healthy.
00:01:53Okay, so we had asked you all the questions up to question number 38.
00:01:57And in a very good way, you learned to explain the very beautiful combination of alternate days.
00:02:03Now in front of you is question number 39, question number 40 and there are a lot of questions after that.
00:02:10Okay, so let me tell you that 39 and 41 are very good level questions in themselves.
00:02:16And if you want to understand this, then you will have to increase your level a little more.
00:02:22Then you will be able to understand this question.
00:02:24So I will keep these two questions on hold for you.
00:02:28And where I think I should tell you, as soon as I finish the alternate days, I will tell you in today's class, but after a while.
00:02:35So it happened on 39 and here question number 40 happened.
00:02:39We keep these two questions on hold.
00:02:42First, we finish the rest of the alternate questions.
00:02:45And then after that, we will see these two questions.
00:02:49Let's go.
00:02:50It was very good.
00:02:51Everyone's birthday.
00:02:52Let's go.
00:02:53It's a great thing.
00:02:54Be happy like this.
00:02:55You guys stay happy.
00:02:56This is what is needed and nothing else is needed.
00:02:57Come.
00:02:58So let's look at our question.
00:02:59Sir, what was said in question number 41?
00:03:01A, B, C do some work in 30 days, 40 days and 50 days.
00:03:05If we start with A, okay.
00:03:08So beginning with A, if A, B and C do the work alternatively, then in how many days the work will be finished?
00:03:13Here, in total, we are getting the work done by three people.
00:03:17And after that, we do the work in this alternate way.
00:03:21So how will it be here?
00:03:23So if we talk, then this will be ours.
00:03:25A will be done after that.
00:03:27B will be done after that.
00:03:29A is doing this work in 30 days.
00:03:31B is doing this work in 40 days.
00:03:34And after that, C is doing this work in 50 days.
00:03:38Now if we look at all the calcium here, then you will say here.
00:03:42Sir, how much calcium do we have?
00:03:44Sir, how much calcium do we have?
00:03:46Sir, how much calcium do we have?
00:03:48Sir, how much calcium do we have?
00:03:50Sir, how much calcium do we have?
00:03:52Sir, how much calcium do we have?
00:03:54Sir, how much calcium do we have?
00:03:56Sir, how much calcium do we have?
00:03:58Sir, how much calcium do we have?
00:04:00Sir, how much calcium do we have?
00:04:02Sir, how much calcium do we have?
00:04:04Sir, how much calcium do we have?
00:04:06Sir, how much calcium do we have?
00:04:08Sir, how much calcium do we have?
00:04:10Sir, how much calcium do we have?
00:04:12If we begin here with A,
00:04:14then first A will work here,
00:04:16then B will work here,
00:04:18then C will work here,
00:04:20then A will work here,
00:04:22then B will work here,
00:04:24then C will work here.
00:04:26And in this way, our work will be on an alternate basis.
00:04:30Read this line of the question.
00:04:32If beginning with A, F, A, B, L, C work on alternatively,
00:04:34then in how many days will the work be finished?
00:04:36So, how many days will the work be done here?
00:04:38If A works on the first day,
00:04:40then it will be 20 units.
00:04:42If B works on the second day,
00:04:44then it will be 15 units.
00:04:46If C works on the third day,
00:04:48then it will be 12 units.
00:04:50And in this way, our work will be on an alternate basis.
00:04:52If in this way, our work will be on an alternate basis,
00:04:54then it will be 1 day, 2 days, and 3 days.
00:04:56And in total, in 3 days,
00:04:58how much work will be done?
00:05:0020, 12, 35, 35, and 12,
00:05:02how much work will be done?
00:05:04So, you will say here,
00:05:06Sir, 600, we have 20, 15, 12, 20, 30, 40.
00:05:08So, 47 units of work will be done.
00:05:10Now, what we will do here?
00:05:12We will multiply this 47 in such a way
00:05:14that we can reach here
00:05:16about 600.
00:05:18So, if you see here,
00:05:20let's say this is 50,
00:05:22then 50 is about 12 times.
00:05:24So, how do we multiply it here?
00:05:26If we see from 13,
00:05:28then from 13, it is 91,
00:05:30and from 13, it is 52,
00:05:32and from 9, it is 300.
00:05:34How much will be done?
00:05:36If it is more than 12,
00:05:38then we multiply it by 12.
00:05:407 times 12 is 84,
00:05:424 times 8 is 5,
00:05:44and 12 is 48,
00:05:46and my brother,
00:05:48how much will be 48 and 8?
00:05:50It will be 564.
00:05:52If we multiply it by 12 there,
00:05:54then we will also multiply it by 12 here.
00:05:56So, how many days will we have?
00:05:58We will have 36 days here.
00:06:00Today we have 36 days,
00:06:02and we have done 564 units of work.
00:06:04So, what do we do next?
00:06:06We will say that we have done so much work
00:06:08in 36 days.
00:06:10Now, what is the most important thing here?
00:06:12We have done so much work in 36 days.
00:06:14So, let me tell you a small thing.
00:06:16And that is,
00:06:18if I call A the next day,
00:06:20how much work will he do here?
00:06:22He will do 20 units of work.
00:06:24How much work will he do?
00:06:26He will do 20 units of work.
00:06:28So, who do you call the next day?
00:06:30You call A the next day.
00:06:32You call A the next day.
00:06:34He will do 20 units of work.
00:06:36So, in total,
00:06:38you will have
00:06:4037 days here.
00:06:42And how much work will you do now?
00:06:44You have done 584 units of work here.
00:06:46In 564, we will add 20.
00:06:48You will have 584.
00:06:50You call A the next day.
00:06:52Who did you do this work with?
00:06:54You call A.
00:06:56Who did you do this work with?
00:06:58You call B.
00:07:00In this way,
00:07:02we have done
00:07:0436, 37, and 38 units of work.
00:07:06And in all these days,
00:07:08we have done
00:07:10599 units of work.
00:07:14So, I always say that
00:07:16little by little,
00:07:18a drop by drop, a well grows.
00:07:20So, friends, if a drop by drop, a well grows,
00:07:22what will we do here?
00:07:24So, we will do the first work here.
00:07:26For example, in one day,
00:07:28A will do A work in this much time.
00:07:30B will do B work in this much time.
00:07:32So, in the first day, A will do 20.
00:07:34In the second day, B will do 15.
00:07:36In the third day, C will do 12.
00:07:38And in this way, work will start.
00:07:40We will do work for 3 days.
00:07:42In 3 days, 47 is equal to 12.
00:07:44And in the third day, it is equal to 12.
00:07:46If I had done 13 times,
00:07:48my value would have increased a lot.
00:07:50And I did not need it.
00:07:52I cannot do more work in the future.
00:07:54I will do a little less work.
00:07:56If I had done 12 times,
00:07:58my value would have increased a lot.
00:08:00In the next day, A will do 20.
00:08:02In the next day, B will do 15.
00:08:04So, in total,
00:08:06in 38 days, 599 units of work have been done.
00:08:10Now, if we see here,
00:08:12how many days have passed?
00:08:14So, 38 days have passed.
00:08:16After that,
00:08:18what do we do here?
00:08:20We subtract 599 from 600.
00:08:22So, 1 is left.
00:08:24If you put it here, you will put it up.
00:08:26And now,
00:08:28the work that will come,
00:08:30you will put its capacity down.
00:08:32So, if you look here carefully,
00:08:34you will say,
00:08:36A has done work.
00:08:38B has done work.
00:08:40Now, it is C's turn.
00:08:42And C does 12 units of work.
00:08:44So, in 38 days,
00:08:4612 will be the correct answer.
00:08:48So, in 38 days,
00:08:5012 will be the correct answer.
00:08:53R, S and T
00:08:55are done in 20, 15 and 10 days.
00:08:57So, here we put R.
00:08:59Here, we put S.
00:09:01And here, we put T.
00:09:03R is done in 20 days.
00:09:05S is done in 15 days.
00:09:07T is done in 10 days.
00:09:09If we take all the calcium here,
00:09:11how much will be our total calcium?
00:09:13It will be 60.
00:09:153 times 20 is 15.
00:09:174 times 10 is 6.
00:09:19Now, what is said in the question?
00:09:21Here, read this line.
00:09:23R works on all days.
00:09:25R works on all days.
00:09:27If I am getting my work done,
00:09:29the first day is also R,
00:09:31the second day is also R,
00:09:33the third day is also R.
00:09:35This is a very beautiful way.
00:09:37Here, I will tell you the number line.
00:09:39If it is the first day,
00:09:41the second day is also R,
00:09:43the third day is also R,
00:09:45the fourth day is also R.
00:09:47So, there is no sign of R here.
00:09:49After that, what is said?
00:09:51And S.
00:09:53And T work on alternate days with T.
00:09:55S and T work on alternate days with T,
00:09:57starting the work on first day.
00:09:59Like here,
00:10:01one day my brother T will work,
00:10:03the next day only S will work with him.
00:10:05Then one day T will work,
00:10:07then my brother S will work.
00:10:09Do you understand the point here?
00:10:11R works from the beginning to the end.
00:10:13S and T work in separate days.
00:10:15S and T work in separate days.
00:10:17In this, T starts from the first day.
00:10:19In this, T starts from the first day.
00:10:21In this, T starts from the first day.
00:10:233 plus 6 will be 9.
00:10:253 plus 6 will be 9.
00:10:27Here, R works for 3 units,
00:10:29T works for 6 units.
00:10:31Here, R works for 3 units,
00:10:33T works for 6 units.
00:10:35After that, R and S work together.
00:10:37After that, R and S work together.
00:10:39After that, R and S work together.
00:10:41After that, R and S work together.
00:10:43After that, R and S work together.
00:10:45We will not face any problem.
00:10:47We will not face any problem.
00:10:49Do you understand the point?
00:10:51Now the question is,
00:10:53how many days does it take to complete the work?
00:10:55First day 9 work,
00:10:57second day 7 work,
00:10:59then 9, then 7.
00:11:01This pattern is repeated for how many days?
00:11:03This pattern is repeated for how many days?
00:11:05In 2 days.
00:11:07In 2 days, we have completed 16 units of work.
00:11:09Now, we have to multiply 16 by 60.
00:11:11Now, we have to multiply 16 by 60.
00:11:13If it is 64,
00:11:15we can't do this.
00:11:17We need to multiple by 3.
00:11:19If it is 3,
00:11:21then we multiply by 3 here.
00:11:23Basically,
00:11:25we will have 48 units of work done in 6 days.
00:11:29and next day we will cal you to work,
00:11:31you will be called from here
00:11:33and next day we will call you to work,
00:11:35you will work in total of 9 units.
00:11:37In total,
00:11:39you will have 57 units of work done.
00:11:41work and if in 7 days 57 units have been done where a person by the name of B has come and
00:11:48done the work, then the next day if we have to call, then we will call B, but how to write
00:11:53the answer here?
00:11:54So I always say this, all the days that have passed, write them here, all your work is
00:12:00left, like you got 57 out of 60 here, so how much is left?
00:12:053 are left, so where will you write what is left above and whoever is going to work,
00:12:11who will go to do it, now R and S will go to work, so my brother will write their ability
00:12:16below.
00:12:17Actually, we only need 3 units of work, but they are forced to do less than 7 units, so
00:12:24that's why we don't take their whole day, we take 3 times 7 parts of their day and get
00:12:30the work done in this much, so whatever work is left is above and whoever comes to do the
00:12:34work, writes its ability below.
00:12:36If you do it by multiplying it, then 7 into 7 is 49, 49 and 3 will be how much, 52 divided
00:12:42by 7 and 52 divided by 7 means option number D for Dev Sena, so this way my brother, you
00:12:48will be able to answer this question, so I think that I have told you almost all the
00:12:53things in alternate days and somewhere our brother must not be having any problem, come
00:12:58on, you guys just give the answer to this question, so we will agree that you have learned
00:13:03all the things in alternate days, my brother, what has been said here, read it, so if you
00:13:09look at question number 43, then it has been said that A alone can do a work in 11 days,
00:13:14B alone can do the same work in 22, C alone can do the same work in 33, if A works alone,
00:13:20then he can work here for 11 days, if B works alone, then he can do this work in 22 days,
00:13:27if C works alone, then he can do this work in 33 days, if we all take LCM here, then
00:13:34this will be our brother 66, this is 6 times, 3 times and this is my brother 2 times, I
00:13:40understood the thing here, the first thing is what is the way to work, they work in the
00:13:45following manner, manner means in this way that A and B will work on the first day, so
00:13:50if we look at the first day, then A and B work here on the first day, after that who
00:13:56works on the second day, then B and C work, on the third day, my brother, who works here,
00:14:01then A and C work, okay, then on the fourth day, A and B are here, then the cycle here
00:14:06is repeated again, A and B will come here again and in the same way, my brother, this
00:14:11work will continue, then our A plus B will come on the fourth day, then on the fifth
00:14:15day, it will come on the sixth day, now once when I was teaching this question offline,
00:14:20then a child said to me that sir, this is given on day 4, where it is written that the
00:14:26work will be done in the same way ahead of it, so the child did not write below it, but
00:14:30it is written above that they work in the following manner, so you will have to understand
00:14:36and understand that giving day 4 means giving information about this here, giving information
00:14:42about this somewhere, that if A plus B comes here on the fourth day, then what will come
00:14:48after that, that B plus C will come and what will come after that, that A plus C will come,
00:14:53that is, this cycle is going to be repeated, this is the confirmation of this, my brother
00:14:58here is a complete 100% witness, so if we talk, then our work will be completed in this
00:15:05way, when A and B work, then how much work will you do, then you will say sir, 9 units,
00:15:09when B and C work, then 5 units, when A and C work, then 8 units, again 9 will be there,
00:15:15again 5 will be there, again 8 will be there, so in total, my brother will be here in 3 days,
00:15:19what will be our work in 3 days, 9, 5, 14 and 8, my brother will be 22, okay, and if
00:15:26there will be 22 units of work in 3 days, there will be 22 units of work in 3 days, so how far will we
00:15:32take it by multiplying it, so we will multiply it by 3, so it will be 66 and here
00:15:38we will multiply it by 3, so how much will it be, so it will be 9, that is, in total,
00:15:44our work will end in 9 days, in total, our work will end in how many days, so it will end in 9 days,
00:15:53keep this thing here, come on, let's see the next question here, we know the next question here,
00:15:59what is said here, what is this ALP commenting, child, what is this ALP, ALP, what is this comment,
00:16:06what is this, tell me brother, it will be right for ALP, okay, the question of Sejal, see brother,
00:16:14nothing like this happens anywhere that the question in which the tag of ALP is applied, it will be asked in ALP,
00:16:20in which Sejal is applied, it will be asked in Sejal, honestly I am telling you, now you see the paper of UP Constable,
00:16:25not a single question is such that I have studied in your batch and it has not come, not a single question is such,
00:16:32okay, one more thing, when I am looking at the questions of UP Constable, then the paper of 23 August shift no. 2
00:16:37has been asked so well that I will put their questions in your sheet now, okay, that this question has come here,
00:16:43let's see this question, let's see this question, so what is the basic, brother, like assume that there is a software,
00:16:49what TCS has done in it, it has made a question and set it, when there is a Sejal paper here,
00:16:55it gives the question to Sejal, when there is a paper of UP Constable, it gives it to them, when there is a paper of ALP,
00:17:01it comes to them there, so sir, the syllabus is the same, the percentage is the same, the concept that is used in the percentage is fixed there,
00:17:10okay, so you don't have to worry about it, come on, see the 44 number question, what is said, what we are teaching you,
00:17:17I am teaching you specially, after reading this, you will be able to pass any exam in India, no problem,
00:17:22so to do a certain work, Ajay and Bharat, here it is said, work on alternate days, with Bharat starting the work on first day,
00:17:32Ajay can finish the alone in my brother 32 days, in how many days can exactly, okay, if the work gets completed in exactly 8 days,
00:17:41then Bharat alone can do 7 times of the same work, there is no easier question than this on earth,
00:17:47it is said that if someone has to work, then Ajay and Bharat work in alternate days, in which Bharat works on the first day,
00:17:53okay, so here it is said, read a very good question, to do a certain work, Ajay and Bharat work on alternate days,
00:18:01Bharat starts the work on the first day, then Ajay will come on the second day, and if Ajay does the work alone, then the work can be completed in 32 days,
00:18:10if the work gets completed in exactly 8 days, means here it is said, see what happens, if you have to do the work with Ajay,
00:18:18then call him quietly for 32 days, and here he will finish the work in so many days, but if you have to do the work in this way,
00:18:26first if we talk, here Bharat starting on the first day, suppose first Bharat will come, then after that Ajay will come,
00:18:34then my brother Bharat will come, then Ajay will come, so in this way, the number of days you will take,
00:18:39it is going to take exactly 8 days here, how much is going to take, so it is going to take 8 days,
00:18:46so what will happen here, it is said here, then Bharat alone can do 7 times of the same work in how many days,
00:18:54so first I ask you this question, if suppose Ajay does the work alone for 32 days,
00:19:00both people together do the work here in 8 days, so tell me, if I want Bharat to do the work,
00:19:06my wish is not to get Ajay to do the work, and neither is my wish to combine these two,
00:19:11my wish is only that Bharat should do all the work, so how many days will Bharat do that work,
00:19:17now for this, you will have to understand a small thing and you will have to cooperate with me,
00:19:22suppose any work is done in 6 days, suppose our Munna comes here on the first day,
00:19:28and suppose Rohit comes here on the second day, and Sheila comes on the second day,
00:19:35then Rohit comes on the first day, then Sheila comes on the second day,
00:19:38in this way, suppose the work is done in 4 days, so in 4 days, how many days did Rohit work and how many days did Sheila work,
00:19:46so you will say, Guruji, in 4 days, Rohit came here for 2 days, and who came here for 2 days, Sheila came here for 2 days,
00:19:52in 4 days, Rohit came here for 2 days, and who came here for 2 days, Sheila came here for 2 days,
00:19:56suppose the work is done in 6 days, and suppose in 6 days,
00:20:02in a way, there is a girl named Abhishek and a girl named Sneha,
00:20:06on the first day, Abhishek, on the second day, Sneha, then Abhishek, then Sneha,
00:20:09then Abhishek, then Sneha, then Abhishek, then Sneha,
00:20:17so if we see, how many days did Abhishek come, 3 days, and how many days did Sneha come, 3 days,
00:20:22so here, 3 days Abhishek, 3 days Sneha, in this way, our work will be done here,
00:20:27so in reality, what will happen here, keep this in mind,
00:20:31second, suppose, if I say something about a work,
00:20:36which is giving you a small form of MDH concept,
00:20:41so here, we are giving a form of MDH concept,
00:20:46so if we understand the form of MDH concept,
00:20:49so what is said here, one work is done here in 10 days,
00:20:53and another work is done in 20 days,
00:20:56now how will you write this,
00:20:58so you will say like this, suppose, A has its own capacity,
00:21:02so multiply its own capacity with time,
00:21:06so work will be obtained,
00:21:08basically, what is the method of obtaining work,
00:21:10so you say, work is equal to efficiency into time,
00:21:13multiply A's efficiency with time,
00:21:16so the same work will be obtained, which work B will do in 20 days with its efficiency,
00:21:20if I want to say this thing tomorrow,
00:21:23the work which A and B will do together in 10 days,
00:21:29that work B will do alone in 30 days,
00:21:32so how will we write it, we will write it like this,
00:21:35the work which A and B will do together in 10 days,
00:21:38the same work B will do here in how many days,
00:21:41he will do it in 30 days,
00:21:43suppose, I have to write this thing tomorrow,
00:21:48suppose, I have two ways to do a work,
00:21:52either one way is to call only A for 20 days,
00:21:55or the other way is to call A for 8 days,
00:22:00and then call B for 15 days,
00:22:04and then my work will be complete,
00:22:06so I can say like this,
00:22:08either we call A for 20 days,
00:22:11and then call A for 8 days, and call B for 15 days,
00:22:15so our work will be complete,
00:22:17in fact, we can write this line like this,
00:22:20see, there is one way,
00:22:21if you call A, then he will take 100 days,
00:22:24but if you call three people,
00:22:26suppose, you call A for 10 days,
00:22:28suppose, you call B for 5 days,
00:22:30and suppose, you call C for 10 days,
00:22:32in this way, your work can finish a little early,
00:22:36now you will say, sir, there are 100 people here,
00:22:38so why are they not getting 100 when they are joined,
00:22:40that's why, because their capacity is different,
00:22:42their capacity is different, their capacity is different,
00:22:44all of them are different workers here,
00:22:47now I will bring you to the question,
00:22:50here, B, A, then B, A,
00:22:52in this way, our work is done in 8 days,
00:22:55so here, if this is done in 8 days,
00:22:57so you understand,
00:22:59B came, then A came, then B came, then A came,
00:23:01then my brother B came, then A came,
00:23:04then B came, then A came,
00:23:06so how many days did B work,
00:23:081, 2, 3 and 4,
00:23:10and how much did A do, 2, 3 and 4,
00:23:12so here B also worked for 4 days,
00:23:14A also worked for 4 days,
00:23:16B also worked for 4 days,
00:23:18A also worked for 4 days,
00:23:20in this way, the work was completed,
00:23:22so now I will explain this part to you,
00:23:26what are the options we have,
00:23:28so if I now submit all the things here,
00:23:31so here I can say,
00:23:33either I call A here for 32 days,
00:23:35so the work is over,
00:23:37or we can say 4 days from B and 4 days from A,
00:23:40that is, what will happen here,
00:23:424 days from B and 4 days from A,
00:23:44then our work is over,
00:23:46that is, the total work can be done in two ways,
00:23:49either collect the total work,
00:23:51call A here and get it done for 32 days,
00:23:54or alternatively,
00:23:564 days here for A and 4 days here for B,
00:23:59then what will happen,
00:24:01if you see here,
00:24:03friends will say,
00:24:05Sir, see this is 32A,
00:24:07and subtract 4 from 32,
00:24:09then it will be 28A,
00:24:11then how much will be our A,
00:24:13then 4 will be our B,
00:24:15if we subtract here,
00:24:17then we will say,
00:24:19Sir, subtract from 4,
00:24:21how many times, 7 times,
00:24:23so here the value of A upon B,
00:24:25will be 1 upon 7,
00:24:27how much will be 1 upon 7,
00:24:29how much will be 1 upon 7,
00:24:31it is clear,
00:24:33this is their ability,
00:24:35now how can we get the total work,
00:24:37so whatever is our total work,
00:24:39either we put its value here,
00:24:41then it will come,
00:24:43or we put its value here, then it will come,
00:24:45are you getting the point,
00:24:47this way we can do it,
00:24:49now in the question,
00:24:51Bharat alone can do 7 times of the same work,
00:24:53how many times will Bharat do that work,
00:24:55in how many days,
00:24:57means what to subtract from Bharat,
00:24:59time, time is equal to work upon efficiency,
00:25:01first thing, how much is the work,
00:25:03so 1 unit into 32,
00:25:05this is our work,
00:25:07if this value is 1, then 1 into 32,
00:25:09here 32 will come,
00:25:11or else if you put this value here, then 32 will come,
00:25:13this is the work,
00:25:15and how many times to do this work,
00:25:177 times,
00:25:19so how many times to do this work, 7 times,
00:25:21and with whom you want to do this work,
00:25:23so here you want to do this work with Bharat,
00:25:25whose own ability is how much,
00:25:27so Bharat's ability is 7,
00:25:29from 7 to 7,
00:25:31answer will be 32,
00:25:33option number D for Dev Sena,
00:25:35what will happen here,
00:25:37option number D for Dev Sena,
00:25:39one brother says, sir, this 8 you have written,
00:25:41this can be 5 plus 3 also,
00:25:43how can it be 5 plus 3,
00:25:45some stupid person can say this,
00:25:47why, because in the question
00:25:49it is said that Bharat is starting the work,
00:25:51so Bharat will be present
00:25:53the next day,
00:25:55so first day Bharat, then A, then B,
00:25:57then A, then B, then A, then B, then A,
00:25:59so from where you will make a combination of 5 and 3,
00:26:01your rule does not work here,
00:26:03neither my uncle's rule is working here,
00:26:05so my brother, when someone's rule is not working,
00:26:07then we will go by the rule of mathematics,
00:26:09and the rule of mathematics says here,
00:26:11that if the first day is Bharat,
00:26:13then the second day is A, then Bharat, then A,
00:26:15we do not have the owner of our mind here,
00:26:17that we will put anything,
00:26:19run anything, it cannot be like this,
00:26:21so either we will call A for 32 days,
00:26:23or my brother will call Bharat for 4 days,
00:26:25call A for 4 days,
00:26:27this efficiency has come out,
00:26:29how much is our total work,
00:26:31so 1 into 32,
00:26:33to whom we have to get 7 times of this total work,
00:26:35so from Bharat, so we will divide it,
00:26:37so we will do it from Bharat,
00:26:39ok brother, let's go today,
00:26:41let's see the next question here,
00:26:43let's see the next question,
00:26:45we will know all the good questions,
00:26:47come on,
00:26:49see the next question,
00:26:51your question is in front of you,
00:26:53so read it,
00:26:55so in this question,
00:26:57we were told that Aman and Rajan are working on a construction site,
00:26:59in this engineering experiment,
00:27:01Aman is building a wall,
00:27:03while Rajan is making the wall fall,
00:27:05Aman can build a wall in 15 days,
00:27:07and Rajan can make it fall in 20 days,
00:27:09if they work in a single day,
00:27:11in which Aman builds the first day,
00:27:13then when will the whole wall be built,
00:27:15for the first time,
00:27:17you do not take this statement lightly,
00:27:19when will the whole wall be built,
00:27:21for the first time,
00:27:23I can give you a lot of examples,
00:27:25to explain such questions,
00:27:27to explain such questions,
00:27:29how they are made,
00:27:31how it is asked in the paper,
00:27:33what is the fundamental of it,
00:27:35so when you read alternatives,
00:27:37so when you read alternatives,
00:27:39there is a concept of negative work,
00:27:41so understand this,
00:27:43concept of negative work,
00:27:45what is the concept of,
00:27:47concept of negative work,
00:27:49and where is this negative work,
00:27:51so negative work in alternatives,
00:27:53where is it,
00:27:55so how this concept works,
00:27:57so actually there are three types of questions here,
00:27:59so actually there are three types of questions here,
00:28:01and what are those three types of questions,
00:28:03so question number one is,
00:28:05there is a person named A,
00:28:07there is a person named A,
00:28:09he can build a wall in 10 days,
00:28:11but there is a person named B,
00:28:13he can make that wall fall in 20 days,
00:28:15the one who builds the wall takes 10 days,
00:28:17and the one who destroy it takes 20 days,
00:28:19and here it is said,
00:28:21if he works in an alternative way,
00:28:23my brother is working in alternate way
00:28:25he is working in this way
00:28:27he is working in alternate way
00:28:29first my brother i will give you
00:28:31this example
00:28:33after that i will give you
00:28:35more examples
00:28:37so the thing here is
00:28:39if on first day you have to do A
00:28:41then you have to do B
00:28:43then you have to do A
00:28:45then you have to do B
00:28:47so in question it is said
00:28:49when will this work
00:28:51end
00:28:53we have said about first time
00:28:55in question it is said
00:28:57that first time
00:28:59i am repeating again
00:29:01first time work
00:29:03when will it end
00:29:05now a kid
00:29:07didn't understand
00:29:09he saw that
00:29:11first day he will do 2 unit
00:29:13and second day he will do 1
00:29:15then he will do 2 unit
00:29:17then he will do 1
00:29:19then he will do 1
00:29:21then he will do 1
00:29:23then he will do 1
00:29:25then he will do 1
00:29:27then he will do 1
00:29:29then he will do 1
00:29:31then he will do 1
00:29:33then he will do 1
00:29:35then he will do 1
00:29:37then he will do 1
00:29:39then he will do 1
00:29:41then he will do 1
00:29:43then he will do 1
00:29:45then he will do 1
00:29:47sorry it will not be 37
00:29:49here
00:29:51ok
00:29:53I am going right
00:29:55so it will be 37
00:29:57and 49
00:29:59and then
00:30:01it will be 40
00:30:03and third option
00:30:05this is none of these
00:30:07these 4 options came in your exam
00:30:09one brother told us
00:30:11that work in 2 days is 1 unit
00:30:13I have to make it 1 to 20
00:30:15to make 1 to 20
00:30:17he multiplied by 20
00:30:19and here also
00:30:21in his eyes
00:30:23in 40 days
00:30:25he did 20 work
00:30:27and he is very happy
00:30:29and he got option T
00:30:31when he was asked
00:30:33how was the paper
00:30:35he said it was very good
00:30:37I have solved all the questions
00:30:39my options were also there
00:30:41and I made it
00:30:43in first day he did 2 unit work
00:30:45then he made it 1
00:30:47then he made it 2
00:30:49then he made it 1
00:30:51but let me tell you
00:30:53your answer is wrong
00:30:55and why it is wrong
00:30:57I will tell you
00:30:59only because of this line
00:31:01this is the first time
00:31:03only because of this
00:31:05your answer is wrong
00:31:07you will say
00:31:09why it is wrong
00:31:11let me tell you
00:31:13you will analyze small things
00:31:15you will get clarity
00:31:17how you have to opt
00:31:19in such questions
00:31:21in such questions
00:31:23you have to opt
00:31:25in such questions
00:31:27how to make
00:31:29you know
00:31:31in 2 days
00:31:33your work
00:31:35is 1 unit
00:31:37now if you
00:31:39you are here
00:31:41you are here
00:31:43you just do it
00:31:4519
00:31:4719
00:31:4919
00:31:5119
00:31:5319
00:31:5519 x 2
00:31:5719 x 2
00:31:5919 x 2
00:32:0119 x 2
00:32:0319 x 2
00:32:0519 x 2
00:32:07next day
00:32:09I will call someone
00:32:11I call him for a day
00:32:13and I call him
00:32:15how much work he does
00:32:17you will say
00:32:19you are here
00:32:21do this
00:32:23it will be 36
00:32:25then 37
00:32:27then 38
00:32:29it will be 19
00:32:31now it will be 19
00:32:33I told you
00:32:35first day
00:32:37now if I
00:32:39call A for a day
00:32:41he will do 2 unit
00:32:43and if he will do 2 unit
00:32:45then my work will be useless
00:32:47my work will be useless
00:32:49and if my work will be useless
00:32:51then it will be a problem
00:32:53we will not call A for a whole day
00:32:55we will call him for half a day
00:32:57and ask him to do half a day
00:32:59the correct answer
00:33:01will be
00:33:03we will write 38
00:33:05subtract 19 from 20
00:33:071 is left
00:33:09and the ability of the person who is coming to do the work
00:33:11means 38.5 days
00:33:13and 38.5 days means
00:33:15our answer will be
00:33:1739
00:33:19now you will say
00:33:21how does it happen
00:33:23the first time
00:33:25you have done the work
00:33:27on the 38th day
00:33:29what happens after that
00:33:31I am explaining you
00:33:33how to complete the work
00:33:35don't make a fuss
00:33:37be patient
00:33:39let's say I have done half a day
00:33:41he has done one unit
00:33:43so here
00:33:45it is 38.5 days
00:33:47and in 38.5 days
00:33:49he will do 20 unit work
00:33:51there is no doubt
00:33:53there is no doubt
00:33:55now
00:33:57what happens after that
00:33:59this is the first time
00:34:01our work is completed in 38.5 days
00:34:03now what happens after that
00:34:05we do the work for half a day
00:34:07in that half a day
00:34:09he does one more unit work
00:34:11when he has done one unit work in half a day
00:34:13then he will do one more unit work in half a day
00:34:15now total is 39 days
00:34:17our work is 21
00:34:19now next day I call B
00:34:21and B
00:34:23does one day work
00:34:25and B does one day work
00:34:27now again
00:34:29it is 40 days
00:34:31now again
00:34:33it is 40 days
00:34:35after doing one more day
00:34:37and again I have come to 20
00:34:39so we will say
00:34:41again in 40 days
00:34:43we have come to 20 unit work
00:34:45again in 40 days we have come to 20 unit work
00:34:47so always in such questions
00:34:49it is asked that
00:34:51when was the work completed for the first time
00:34:53when was the work completed for the first time
00:34:55when was the work completed for the first time
00:34:57now how many types of questions are there
00:34:59and what is the way to make them
00:35:01now the way I am telling you to make
00:35:03I just want to say
00:35:05to make such questions
00:35:07make a note in a copy
00:35:09and write
00:35:11that after today whatever work you do
00:35:13and one person will do positive work
00:35:15and one person will do negative work
00:35:17in alternate days whenever two people work
00:35:19one positive and one negative
00:35:21in that case never multiply it
00:35:23if you want to multiply
00:35:25then always
00:35:27if you subtract 2 from 20
00:35:29then it will be 18
00:35:31that means you have to multiply it
00:35:33and take it to 18
00:35:35and make it
00:35:37like this question of yours
00:35:39may be someone did not understand
00:35:41this example
00:35:43no problem
00:35:45when I will make 2-3 questions
00:35:47then you will not understand
00:35:49now see here
00:35:51one wall is for making
00:35:53and another is for subtracting
00:35:55you can make it in 15 days
00:35:57and another one will take 20 days
00:35:59to make it
00:36:01so Amar will make it in 15 days
00:36:03and Rajan will make it in 20 days
00:36:05and Rajan will make it in 20 days
00:36:07and Rajan will make it in 20 days
00:36:09and Rajan will make it in 20 days
00:36:11and Rajan will make it in 20 days
00:36:13and Rajan will make it in 20 days
00:36:15and Rajan will make it in 20 days
00:36:17and Rajan will make it in 20 days
00:36:19now what happens here
00:36:21first day Amar will come
00:36:234 units will work here
00:36:252nd day these 3 units will finish
00:36:27then these 4 units
00:36:29then these 3 units
00:36:31so every 2-2 days it is repeating
00:36:33here how much work is done in 2 days
00:36:35so you will say here
00:36:37that sir the work done in 2 days
00:36:39how much is it?
00:36:41if both of them do positive work
00:36:43then we multiply this 1
00:36:45and make it equal to
00:36:4760
00:36:49but as I told you in note
00:36:51and I told you
00:36:53that whenever 2 people are
00:36:55with you
00:36:57one is doing positive work and
00:36:59one is doing negative work
00:37:01so in that case
00:37:03what you will do here
00:37:05whatever is the total work
00:37:07from this work subtract the positive one
00:37:09means you subtract
00:37:114 from 60
00:37:13so when you subtract 4 from 60
00:37:1556
00:37:17so you have to make it 56
00:37:19not 60
00:37:21you have to make 56
00:37:23so here you will say
00:37:25sir see
00:37:27how much we will make it
00:37:29so we will make it 56
00:37:31so here it will be 56
00:37:33and here it will be double of 56
00:37:35so in total you will say
00:37:37112
00:37:39now how many days have passed here
00:37:41so 112 days
00:37:4356
00:37:45next day if I want
00:37:47I will call Aman here
00:37:49only one day he will work
00:37:51and he will give me 4 units of work
00:37:53so 113 days have passed
00:37:55and here
00:37:57total 60 days work is done
00:37:59so what will be the answer
00:38:01option number C
00:38:03is it only 113 days work will be done
00:38:05so it is not like that
00:38:07after that work again
00:38:09if I call again next day
00:38:11he will subtract 3
00:38:13if I call again next day
00:38:15he will give me 4 units of work
00:38:17if I call again next day
00:38:19he will give me 3 units of work
00:38:21if I call again next day
00:38:23he will give me 4 units of work
00:38:25if you see here
00:38:27so in total
00:38:29113
00:38:31you have to see here
00:38:33here 113
00:38:35then one more day
00:38:37work will be minus 3
00:38:39then one more day work
00:38:41then one more day work
00:38:43then minus 3
00:38:45now in total
00:38:473,3,6,3,9,3,12,4,4,8,4,12
00:38:49you have come back
00:38:51in 113 you add 7 more days
00:38:53so in front of you 120 days will be done
00:38:55and in 60 you add 0
00:38:57so you will come back to 60
00:38:59means first time work
00:39:01was completed on 113rd day
00:39:03and second time work was completed
00:39:05in 120th day work was completed
00:39:07so your answer is correct
00:39:09but
00:39:11according to this question
00:39:13when will the first time work be done
00:39:15so first time work will be done on 113rd day
00:39:17you can understand this
00:39:19in this way
00:39:21what is the real meaning of this question
00:39:23there are two more forms
00:39:25of this question
00:39:27what are the two forms
00:39:29one is monkey form
00:39:31I am explaining monkey form
00:39:33what is monkey form
00:39:35and second form is
00:39:37truncated form
00:39:41in monkey form
00:39:43you will be asked
00:39:45I will replace this question
00:39:47with monkey form
00:39:49so that you can understand
00:39:51there is a monkey
00:39:53who climbs 15 meters in first minute
00:39:55and 20 meters in second minute
00:39:57he slips
00:39:59or you can say
00:40:01there is a 60 meters long tree
00:40:03in first minute he slips
00:40:05and in second minute
00:40:07he slips
00:40:09in first minute
00:40:11there is a monkey
00:40:13in first minute
00:40:15we are giving good examples
00:40:17in first minute
00:40:19he will climb 4 meters
00:40:21you can write like this
00:40:23what will he do in 4 meters
00:40:25in second minute
00:40:27he will get down
00:40:293 meters
00:40:31what will he do in 3 meters
00:40:33he will get down
00:40:35like here is a pole
00:40:37and what is the length of this pole
00:40:39this pole is 60 meters
00:40:41what is the length of this pole
00:40:43you will say
00:40:45this pole is 60 meters
00:40:47what is the condition with monkey
00:40:49so with monkey
00:40:51the condition is
00:40:53in first minute
00:40:55he climbs
00:40:57so he goes
00:40:59in second minute
00:41:01he gets down
00:41:03and what will happen
00:41:05he will climb 4 meters
00:41:07and get down
00:41:09so like this monkey
00:41:11for the first time
00:41:13if there is something on this tree
00:41:15he will go and get it
00:41:17so our question is
00:41:19in first minute and second minute
00:41:21we take 2 minutes
00:41:23in 2 minutes he climbed 4 meters
00:41:25and got down 3 meters
00:41:27how much work he did
00:41:29now if a child
00:41:31multiply this by 60
00:41:33because we have to make it 60
00:41:35and here also he
00:41:37multiply by 60
00:41:39so here he makes a mistake
00:41:41don't do like this
00:41:43you don't have to do like this
00:41:45what you have to do
00:41:47always subtract positive from total work
00:41:49subtract 4 from 60
00:41:51so it will be 56
00:41:53so multiply it by 56
00:41:55and here also multiply by 56
00:41:57what will happen
00:41:59so here it will be 112 minutes
00:42:01and in 112 minutes
00:42:03you will have climbed
00:42:0556 units
00:42:07now when next minute monkey's turn will come
00:42:09so assume that monkey is here
00:42:11now in next minute
00:42:13what he will do
00:42:15see how many units he has climbed
00:42:17so monkey has climbed 56 units
00:42:19and has come here
00:42:21now in next minute
00:42:23he will jump 4 units
00:42:25one minute story will be here
00:42:27he will jump 4 units
00:42:29and in total in 113 minutes
00:42:31for the first time
00:42:33he has reached this point
00:42:35now what will happen
00:42:37next time
00:42:39in next minute
00:42:41he will come down
00:42:43and again climb
00:42:45and again climb
00:42:47and in 120th minute
00:42:49he will reach here
00:42:51and in 113th minute
00:42:53he will climb 14th, 15th, 16th, 17th
00:42:5518th, 19th
00:42:57and when he will climb 20th
00:42:59he will reach here
00:43:01so one answer is
00:43:03113 is correct
00:43:05and one answer is 120 is also correct
00:43:07so when we talk about first time
00:43:09so what will happen in first time
00:43:11I have given this question
00:43:13as an example
00:43:15I will tell you
00:43:17ok
00:43:19ok
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