QUANTITATIVE APTITUDE - PIPES AND CISTERNS SET 01

PIPES AND CISTERNS SET 01

1.Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long it will take to fill the tank ?
 

A.10 mins        B.12 min        C.15 mins        D.20 mins

 
2. A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time cistern will get filled ?
 

A.7 hours        B.7.1 hours        C.7.2 hours        D.7.3 hours
 

3.A tap can fill a tank in 6 hours. After half the tank is filled then 3 more similar taps are opened. What will be total time taken to fill the tank completely.
 

A.2 hours 30 mins     B.2 hours 45 mins       C.3 hours 30 mins        D.3 hours 45 mins
 

4. A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?
 

A.6 min to empty        B.7 min to full        C.6 min to full        D.7 min to empty
 

5. Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled ?
 

A.2.5 hours        B.2 hours        C.3.5 hours        D.3 hours
 

6. Pipes A and B can fill a tank in 5 hours and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in.
 

A.395        B. 3917        C. 375        D. 3717    
 

7.A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 litres a minute. When the tank is full, the inlet is opened and due to the leak the tank is empty in 8 hours. The capacity of the tank (in litres) is
 

A.5780 litres        B.5770 litres        C.5760 litres        D.5750 litres
 

8.An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took 3 hours 30 min to fill the tank. In what time the leak can drain out all the water of the tank and will make tank empty ?
 

A.10 hours        B.13 hours        C.17 hours        D.21 hours
 

9.A tank can be filled by a tap in 20 minutes and by another tap in 60 minutes. Both the taps are kept open for 10 minutes and then the first tap is shut off. After this, the tank will be completely filled in what time ?
 

A.10 mins        B.15 mins        C.20 mins        D.5 mins
 

10. A cistern can be filled in 9 hours but due to a leak at its bottom it takes 10 hours. If the cistern is full, then the time that the leak will take to make it empty will be ?
 

A.20 hours        B.19 hours        C.90 hours        D.80 hours

Answer Keys:
1.B
2.C
3.D
4.A
5.D
6.B
7.C
8.D
9.C
10.C