Pipes and Cisterns
Inlet/outlet pipes filling or emptying tanks.
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Take a full mock →Q1 · Pipes and Cisterns · EASY
A pipe can fill a tank in 12 hours. Due to a leak at the bottom, it takes 15 hours to fill the tank. If the tank is full, how long will the leak take to empty it?
Q2 · Pipes and Cisterns · MEDIUM
Two pipes A and B can fill a tank in 20 hours and 30 hours respectively. If both pipes are opened together, after how many hours should pipe B be closed so that the tank is filled in 12 hours?
Q3 · Pipes and Cisterns · 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?
Q4 · Pipes and Cisterns · EASY
Pipe A can fill a tank in 12 hours while pipe B can empty it in 18 hours. If both pipes are opened together, in how many hours will the tank be filled?
Q5 · Pipes and Cisterns · MEDIUM
Three pipes A, B and C can fill a tank in 6 hours, 8 hours and 12 hours respectively. If all three pipes are opened together, in how many hours will the tank be filled?