# Pipes & Cisterns

This page will be covering Multiple Choice Questions on Pipes & Cisterns. Few points in regard to solving these questions will come handy.

• If a pipe can fill a tank in x hours, then part filled in 1 hour is (1/x).
• If a pipe can empty a tank in x hours, then part emptied in 1 hour is (1/y).
• If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours (where y > x),then on opening both the pipes, the net part filled in 1 hour is { (1/x) — (1/y)}
• If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours (where x > y),then on opening both the pipes, the net part filled in 1 hour is { (1/y) — (1/x)}
• Pipes & Cisterns questions are considered to be tricky one but they appear consistently in almost all entrance and competitive exams.

1000+ Aptitude Questions on Numerical ability

Pipes & Cistern Aptitude Questions

Q 1 – A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in .. ?
• 4 1/3 Hrs
• 7 Hrs
• 8 Hrs
• 14 Hrs

Q 2 – A tap can fill a tank in 48 minutes where as another tap can empty it in 2 hours. If both taps are opened at 11.40 AM, then the tank will be filled at .. ?
• 12.40 PM
• 1 PM
• 1.20 PM
• 1.30 PM

Q 3 – A tap can completely fill a water tank in 8 hrs. The water tank has a hole in it through which the water leaks out. The leakage will cause the full water tank to get empty in 12 hrs. How much time will it take for the tap to fill the tank completely ..?
• 16 Hrs
• 18 Hrs
• 24 Hrs
• 28 Hrs

Q 4 – Two pipes A & B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are used together, how long will it take to fill the tank … ?
• 12 min
• 15 min
• 18 min
• 25 min

Q 5 – One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in .. ?
• 81 min
• 108 min
• 144 min
• 192 min

Q 6 – Pipes A and B can fill a tank in 20 hrs and 30 hrs respectively and pipe c can epmty the full tank in 40 hrs. If all the pipes are opened together, how much time will it take for the Tank to fill completely .. ?
• 10 3/7 Hrs
• 12 4/5 Hrs
• 17 1/7 Hrs
• 19 1/4 Hrs

Q 7 – Two pipes A and B can fill a tank in 12 minutes and 15 minutes respectively. if both the pipes are opened simultaneously and pipe A is closed after 3 minutes, then how much more time will it take to fill the tank by pipe B .. ?
• 7 min 15 sec
• 7 min 45 sec
• 8 min 5 sec
• 8 min 15 sec

Q 8 – Two pipes A & B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both the pipes are opened. The cistern will be filled in just 30 minutes if if the pipe B is turned OFF after how many minutes ..?
• 5 min
• 9 min
• 10 min
• 15 min

Q 9 – Two pipes A and B can fill a tank in 6 hrs and 4 Hrs respectively. If they are opened on alternate hrs and Pipe A is opened first, in how many hours shall the tank be full ..?
• 4 Hrs
• 4 1/2 Hrs
• 5 Hrs
• 5 1/2 Hrs

Q 10 – A large tanker can be filled by 2 pipes A and B in 60 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A &B fill it together for the other half time ..?
• 15 min
• 20 min
• 27.5 min
• 30 min