Objective type Questions on Pipes and Cisterns-II



History  Questions   1. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How  much time will be taken by A to         fill the cistern separately ?

(a) 1 hr                        (b) 2 hrs                      (c) 6 hrs                      (d) 8 hrs

  1. One pipe can fill a tank three times as fast as another pipe. If together the to pipe can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in :

(a) 81 min                   (b) 108 min                 (c) 144 min                 (d) 192 min

  1. A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank ?

(a) 20 hrs                    (b) 25 hrs                    (c) 35 hrs (d) cannot be determined                               (e) None of these

  1. A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the same time during which the tank is filled by the third pipe  alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours             slower than third pipe. The enquired by the first pipe is :

(a) 6 hrs                      (b) 10 hrs                    (c) 15 hrs                    (d) 30 hrs

  1. 12 buckets of water fill a tank when the capacity of each tank is 13.5 litres. How many buckets will be needed to fill the same tank, If the capacity of each buckets is 9  litres ?

(a) 8                            (b) 15                          (c) 16                          (d) 90

6. Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are             opened on alternate hours and if pipe A is opened first, in how many hours, the tank             shall be full ?

(a) 4                            (b) 4/3*1                         (c) 5                            (d) 5/2*  1

Two pipes A and B can fill a tank in 12 minutes respectively. I both the taps are opened simultaneously and the tap A is closed after 3 minutes, then how much more time will it take to fill the tank by tap B ?

(a) 7 min 15 sec          (b) 7 min 45 Sec         (c) 8 min 5 Sec           (d) 8min 15 Sec

  1. Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes pipe A is turned off. What is the total time required to fill the tank ?

(a) 10 min 20 sec        (b) 11 min 45 sec        (c) 12 min 30 sec        (d) 14 min 40 sec

9. A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it taken to fill the tanker from  empty state if B  is used for half the time                and A and B fill it together for the other half ?

(a) 15 min                   (b) 33 min                   (c) 27.5                       (d) 30 min

10. Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the fill tank in 6 minutes. A and B are kept open for 5 minutes in the  beginning and then C is also opened in what time is the cistern emptied

(a) 30 min                   (b) 33 min                   (c) 37/2*  1 min               (d) 45 min


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