Objective type Questions on Pipes and Cisterns

 

History  Questions

  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 will it take to fill the tank ?

(a) 12 min                   (b) 15 min                   (c) 25 min                   (d) 50 min

  1. 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 will the             cistern get filled ?

(a) 4.5 hrs                   (b) 5 hrs                      (c) 6.5 hrs                   (d) 7.2 hrs

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

(a) 3 hrs 15 min          (b) 3 hrs 45 min          (c) 4 hrs                      (d) 4hrs 15 min

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

(a) 9 min to fill           (b) 6 min to fill           (c) 9 min to empty (d) 9 min to fill           (e) None of these

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

(a) 2                            (b) 2.5                         (c) 3                            (d) .5

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

(a) 1 13 hours             (b) 2  8 hours              (c) 3  9 hours              (d) 4  1 hours

  1. Three pipes A, B can C can fill a tank from empty to full in 30 minutes and 10             minutes respectively . When the tank is empty, all the three pipes are opened A, B             and C discharge chemical solutions  P,Q and R respectively. What is the proportion of         solution R in the liquid in the tank after 3 minutes ?

(a) 5                            (b) 6                            (c) 7`                           (d) 8

  1. Two pipes A Can B can separately fill a cistern in 60 minutes and 75 minutes respectively. Three is a third pipe in the bottom of the cistern to empty it. If all the             three pipes are simultaneously opened, then the cistern is full in 50 minutes. In how             much time the third pipe alone can empty the cistern ?

(a) 90min                    (b) 100 min                 (c) 110 min                 (d) 120 min

  1. A pump can fill tank with water in 2 hours. Because of leak, It took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in  :

(a) 4 1 hrs                   (b) 7 hrs                      (c) 8 hrs                      (d) 14 hrs

10. Two taps A cam B can fill a tank in 5 hours and 20 hour respectively. If both the taps are open then due to a leakage, If took 30 minutes more to fill the tank. If the leak is full, how long           with it take for the leakage alone to empty the tank ?

(a) 4 1 hrs                   (b) 9 hrs                      (c) 18 hrs                    (d) 36 hrs

 

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