# Pipes and Cisterns Questions and Answers

## Questions on 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 for Pipes and Cisterns

• 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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

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

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 11

Time: 00:00:00
Three cisterns D, E and F can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three Hoses are opened. D, E and F discharge chemical solutions U,V and W respectively. What is the proportion of the solution W in the liquid in the tank after 3 minutes?

5/11

5/11

6/11

6/11

7/11

7/11

8/11

8/11

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 12

Time: 00:00:00
A Hose 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) hours

4(1/3) hours

7 hours

7 hours

8 hours

8 hours

14 hours

14 hours

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 13

Time: 00:00:00
A tank is filled in 5 hours by three Hoses D, E and F. The Hose F is two times as fast as E and E is two times as fast as D. How much time will Hose D alone take to fill the tank?

25 hours

25 hours

35 hours

35 hours

Cannot be determined

Cannot be determined

None of these

None of these

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 14

Time: 00:00:00
It takes two Hoses I and J, running together, to fill a tank in 6 minutes. It takes I 5 minutes less than J to fill the tank, then what will be the time taken by J alone to fill the tank?

10 minutes

10 minutes

15 minutes

15 minutes

20 minutes

20 minutes

25 minutes

25 minutes

8 minutes

8 minutes

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 15

Time: 00:00:00
Hose A can fill the tank 3 times faster in comparison to Hose B. It takes 36 minutes for Hose A and B to fill
the tank together. How much time will Hose B alone take to fill the tank?

1. 100 minutes

1. 100 minutes

2. 124 minutes

2. 124 minutes

3. 134 minutes

3. 134 minutes

4. 144 minutes

4. 144 minutes

5. 154 minutes

5. 154 minutes

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 16

Time: 00:00:00
If two Hoses can fill a tank in 24 and 20 minutes respectively and another Hose can empty 3 gallons of water per minute from that tank. When all the three Hoses are working together, it takes 15 minutes to fill the tank. What is the capacity of the tank?

100 gallons

100 gallons

150 gallons

150 gallons

125 gallons

125 gallons

130 gallons

130 gallons

120 gallons

120 gallons

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 17

Time: 00:00:00
Directions: Hoses A and B are used to fill the tank. A can fill the tank twice as fast as B. Hose C and D can empty the tank. D takes same time to empty the tank as B takes to fill it. Hose C can empty the tank in 6 hours.

If all 4 Hoses are opened together, how much hour would it take to fill the tank? Assume D can empty the tank twice as fast as C.

1 hour

1 hour

0.5 hour

0.5 hour

3 hours

3 hours

2 hours

2 hours

Once you attempt the question then PrepInsta explanation will be displayed.