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OD Police PC · Pipes and Cisterns · Quiz

Pipes and Cisterns — quick quiz

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

Question 1 of 1

MEDIUM

Pipe A can fill a tank in 12 hours and Pipe B can empty the same tank in 18 hours. If both pipes are opened together, in how many hours will the tank be filled?