If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Pipes and Cisterns — quick quiz

5 real RRB ALP questions on Pipes and Cisterns. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

Three pipes A, B and C can fill a tank in 10, 15 and 20 hours respectively. All three pipes are opened together, but after 2 hours pipe C is closed. In how many more hours will the tank be completely filled?