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Pipe & Cistern : Part 2 (in Hindi
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Part 2

Abhishek Pandey is teaching live on Unacademy Plus

Abhishek Pandey
Top Educator in Defence Category. Movies, Music, Books.

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M S Mustafaa
4 months ago
Thank you Rini
In type 05, Q2, Why is the total time considered to be 9? 9 should be for A+B. Why have we not taken it as 30-9=21?
Abhishek Pandey
7 months ago
in this question time taken by pipe C is least as companred to B. so tank will always not. A and B did 9 work in 3 minutes. and now when tap C will open this 9 work will empty.
Ananya Sant Ram
7 months ago
Okay, thank you!
sir type 5 que 1 mai starting mai tap Aopen kiya h jo tank fill karta h after 12hrs tap B tank empty karega and it will take 8 hrs right ; but jab tak tap B tank empty karta h tab tak tap A to open rahega na so why r we not considering that
Abhishek Pandey
7 months ago
Because empty time is less.
Monalisha sahu
7 months ago
so we r neglecting the amount of water filled by tap A during this empty time
two pipes A and B can fill a tank in 36min and 45mins resp. A water pipe C can empty the tank in 30 mins. First A and B are opened . after 7 mins , C is also opened. In how many time . the tank is full? acc. to my result through ur method i got 21 minutes because the tank would be empty in this case because the value of C is less than the A and B.. but in the book it sucks.. help me
Abhishek Pandey
a year ago
your answer is correct
Arvind sharma
a year ago
But in the book the answer is diff 🐣
Arvind sharma
a year ago
And thanks sir u r so kind ... ur reply is too fast 🙏🏻
Abhishek Pandey
a year ago
Cheers !!
Abhishek Pandey
a year ago
Tumhara sahi hai.
Arvind sharma
a year ago
ok sir..
Laxmi Angadi
a year ago
but I got 39 minutes to fill the tank sir..and I solved by the same method u taught
Sir can u plz recheck the answers of type 5 questions bcz if the 8 hours take to empty the filled tank and overall time for the process would be 12+8 . Sir plz help me through this
Abhishek Pandey
a year ago
my amswer is correct.
K sir tq.
one more sir ,,, two pipes A and B can fill a tank in 24 mins and 32 mins resp. IF BOTH THE PIPES ARE opened simulatenously , aftr how much time B should be closed so that the tank is full in 18 mins???
Abhishek Pandey
a year ago
8 minute me band kr do.
Arvind sharma
a year ago
got it sir ..
  1. Complete Mathematics Course for AFCAT Exam By Abhishek Pandey


  2. Type roY Soxh 6o 18 2 H- 5


  3. TyPe 05 PB also open d, when e So A:IS =2y 2. 2 5