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# Aptitude MCQs On Pipe & Cistern (Week 4) - 27.01.2022

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Question 1

A tank can be filled by a tap in 20 min and by another tap in 60 min. Both the taps are kept open for 5 min and then the 1st tap is shut off. After this, in how much time, the tank will be completely filled?

Question 2

Tap A can fill a tank in 12 hours, tap B can fill the same tank in 16 hours and tap C can empty the same tank in 8 hours. If all three taps A, B and C are opened together, then how much time (in hours) will be taken to fill the tank?

Question 3

A pipe can fill the tank in 9 hours. The tank is having another pipe attached to its bottom. The tap at bottom can empty the tank in 18 hours. If both the pipes are opened simultaneously. Calculate the time in which the entire tank can be filled?

Question 4

Pipes A and B can fill a tank in 12 minutes and 15 minutes, respectively. The tank when full can be emptied by pipe C in x minutes. When all the three pipes are opened simultaneously, the tank is full in 10 minutes. The value of x is:

Question 5

Two pipes, P and Q can fill a cistern in 15 and 18 minutes respectively. If both are opened together and at the end of 3 minutes, Q is closed, how much longer will the cistern take to fill?
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