QUANTITATIVE APTITUDE - PIPES AND CISTERNS SET 05

PIPES AND CISTERNS SET 05

1. Two pipes A and B can fill a tank is 8 minutes and 14 minutes respectively. If both the pipes are opened simultaneously, and the pipe A is closed after 3 minutes, then how much more time will it take to fill the tank by pipe B?
 

A. 6 min 15 sec    B. 5 min 45 sec        C. 5 min 15 sec    D. 6 min 30 sec
 

2. A water tank is two-fifth full. Pipe A can fill a tank in 12 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?
 

A. 2.8 min        B. 4.2 min        C. 4.8 min        D. 5.6 min
 

3. Pipes A and B can fill a tank in 8 and 24 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. 18 hr        B. 6 hr        C. 24 hr        D. 12 hr
 

4. One pipe can fill a tank 6 times as fast as another pipe. If together the two pipes can fill the tank in 22 minutes, then the slower pipe alone will be able to fill the tank in:
 

A. 164 min        B. 154 min        C. 134 min        D. 144 min
 

5. Two pipes A and B can fill a tank in 2 and 6 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
 

A. 3 min        B. 2.5 min        C. 2 min        D. 1.5 min
 

6.Two pipes can fill a tank in 6hours and 8 hours .While a third pipe empties the full tank in 12hours.If all the three pipes are operate simultaneously, In how much time  will the tank be filled ?
 

A)4 hours           B)4hours 48min             C)5hours            D)5hours 48min         E)None of these
 

7. A tap can fill a tank in 6hrs.After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely ?
 

A)3hrs            B)3hrs 15 min              C)3hrs 45 min              D)4hrs            E)None of these
 

8.Two pipes can fill a tank in 8 hours and 10 hours .If two pipes are operate simultaneously, In how much time  will the tank be filled ?
 

A)4hrs 18min             B)10min           C)4hrs             D)12hrs 10min              E)None of these
 

9.Two pipes  A and B  can fill a tank in 20 minutes and 40 minutes.If both pipes are opened simultaneously , after how much time should B be closed  so that the tank is full in 18 minutes ?
 

A)10 min    B)9 min    C)8 min    D)7min    E)None of these
 

10.A pump can fill the tank in  4 hours.Because of a leak in the tank i took 5(1/2) hours to fill the tank.If the tank is full,how much time will the leak take to empty it ?
 

A)14hrs          B)14hrs 20min            C)14hrs 40min             D)14hrs 45min        E)None of these
 

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