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Pipes & Cistern Quiz : 20.03.2021

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Question 1

Two pipes A and B can fill a tank in 20 hours and 24 hours respectively. If the two pipes opened at 5 in the morning, then at what time the pipe A should be closed to completely fill the tank exactly at 5 in the evening?

Question 2

Three pipes can fill a tank in 3 hours, 5 hours and 6 hours respectively. A waste pipe can empty it. If all the pipes are kept open, the tank gets filled in 100 minutes. How long does the waste pipe take to empty a fully filled tank alone?

Question 3

Pipes A and B can fill a tank in 8 hrs and 12 hrs respectively and a third pipe C can empty it in 4 hrs. If the pipes be opened in order 3 PM, 4 PM and 6 PM, the tank will be emptied at:

Question 4

Two pipes can fill a cistern in 3 hrs and 4 hrs respectively and a waste pipe can empty it in 2 hrs. If all the three pipes kept open, then cistern will be filled in:

Question 5

If 3/5th of a cistern is filled in 1 min, the time needed to fill the rest is:

Question 6

At 7:30am, Shivani noticed that the tank of RO water purifier is empty. She switched on the water purifier as she has to carry 5 liters of water for work. If the purifier releases water to the tank at the rate of 80ml per minute and the outlet from tank releases water at the rate of 250 ml per minute. When should she start collecting water to leave for work the earliest?

Question 7

Water flows at the rate of 10 meters per minute from a cylindrical pipe of 5 mm diameter. How long will it take to fill up a conical vessel whose diameter at the base is 30 cm and depth is 24 cm?

Question 8

Pipe A can fill a tank in 12 hours and Pipe B can fill the tank in 18 hours. If both the pipes are opened on alternate hours and if pipe B is opened first, then in how much time (in hours) the tank will be full?

Question 9

An electric pump can fill a tank in 2 hours. Because of a leak in the tank, it was taking 2 ½ hours to fill the tank. The leak can drain all the water off the tank in how many hours?

Question 10

A water tank can be filled by a tap in 30 minutes and another tap can fill it in 60 minutes. If both the taps are kept open for 5 minutes and then the first tap is closed, how long will it take for the tank to be full after closing the first tap?
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May 21SSC & Railway