Mathematics · Pipes and Cisterns
An inlet pipe can fill an empty tank in 4 1 2 hours, while an outlet pipe drains a completely filled tank in 7 1 5 hours. The tank is initially empty, and the two pipes are alternately opened for an hour each, starting with the inlet pipe. In how many hours will the tank be completely filled?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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20 3 4
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