Pipes and Cisterns Questions and Answers

Pipes and Cisterns Questions

Formula

Definition of Pipes and Cisterns

Pipes and cisterns is an easy yet an important and marks gaining topic given in the aptitude test. Pipes and Cisterns are almost like Time and Work questions. This is a quite straightforward topic yet very important topic from aptitude point of view as the questions on this subject are usually given in a number of competitive examinations including, Campus Recruitment Tests, Banks Entrance Exams, Management Entrance Tests and Other Competitive Exams. In pipes and cisterns problems, it is require to identify the amount or portion of the tank each of the pipes fill or drain in unit time (say in a minute / hour / second) and after that do arithmetic operation on the given value.

Rules

  • Inlet is referred to as the pipe which is supposed to fill the tank.
  • A pipe that is meant to empty the tank is called as outlet.
  • When a pipe works for x hours for filling up the cistern, then 1/x portion of the cistern will be completed in 1 hour.
  • When a pipe works for y hours to empty the cistern, then the portion of the cistern emptied in 1 hour is equals to 1/y
  • Pipe A might fill a cistern n times as quickly as another pipe B. This states that if slower pipe B works for x min to fill the empty tank, then quicker pipe A works for x/n min to fill up the empty cistern. If they work collaboratively, then the portion of the cistern which is loaded up in 1 hour is (n + 1)/x

Question 1

Time: 00:00:00
There are 15 vessels of water with the volume of 60 litters each. Together they can fill the cistern completely. Calculate how many vessels will be required to completely fill the cistern if their volume is reduced to 20 liters.

40 vessels

40 vessels

45 vessels

45 vessels

42 vessels

42 vessels

35 vessels

35 vessels

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Question 2

Time: 00:00:00
There are two pipes, Pipe M and Pipe N. They can fill a container respectively in 9 hours and 3 hours. Both Pipe M and Pipe N are opened alternatively in every hour and pipe N is started after pipe M. Identify in how many hours the container will be overflowed?

7 hr

7 hr

5 hr

5 hr

6 hr

6 hr

4 hr

4 hr

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Question 3

Time: 00:00:00
An electric pump is used for emptying and filling a storage chamber of water. The storage chamber contains 3200 liters of water. What is the filling capacity, if the emptying of the storage chamber is 20 liters/minute more than its filling capacity and the pump requires 8 minutes less to empty the storage chamber than it requires to fill it?

100

100

80

80

70

70

50

50

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Question 4

Time: 00:00:00
Pipe I and Pipe II can fill a container together in 6 minutes. If Pipe II is opened, it will take 5 minutes more than Pipe II. Calculate the time taken by Pipe B to completely fill the container?

12 minutes

12 minutes

15 minutes

15 minutes

10 minutes

10 minutes

11 minutes

11 minutes

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Question 5

Time: 00:00:00
Due to an open outlet pipe a tank will tank 4 hours more to be filled. Normally it takes 8 hours to completely fill. How many hours the outlet pipe will take to empty the full tank?

20 hrs

20 hrs

24 hrs

24 hrs

18 hrs

18 hrs

19 hrs

19 hrs

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Question 6

Time: 00:00:00
A pipe normally fill a cistern in four hours less than 24 hours. Because of a crack on one side of the cistern the pipe will take 5 hours more to fill. If the cistern is completely filled, in how much time the leakage will completely unfill the cistern?

100 hrs

100 hrs

110 hrs

110 hrs

120 hrs

120 hrs

125 hrs

125 hrs

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Question 7

Time: 00:00:00
A tank is 250m in length and 200m in breadth. It is filled through a pipe 0.5m long and 0.4m wide at a speed of 25km/hour. In how much time the water in the tank will reach to 18m level?

110

110

160

160

180

180

140

140

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Question 8

Time: 00:00:00
In 40 minutes Pipe R can fill a tanker completely. The same tanker can be filled by Pipe S 5 times faster than pipe R. In how much time both the pipe together can fill the tanker?

25 minutes

25 minutes

20 minutes

20 minutes

15 minutes

15 minutes

10 minutes

10 minutes

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Question 9

Time: 00:00:00
There is a leakage in the bottom of the tank. Because of it, the tank will take 7 hours more to 14 hours. Find out the time the leakage will take to completely empty the tank?

24 hrs

24 hrs

30 hrs

30 hrs

22 hrs

22 hrs

42 hrs

42 hrs

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Question 10

Time: 00:00:00
Pipe A is 4 times faster than Pipe C. Together they can fill a cistern in 42 minutes. Calculate the time taken by slower pipe to alone fill the cistern?

140

140

150

150

200

200

210

210

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["0","40","60","80","100"]
["Need more practice!","Keep trying!","Not bad!","Good work!","Perfect!"]