Mathematics, 27.07.2021 06:40, bellabarber204
A tank can be filled by one pipe in 3 hours and by a second pipe in 5 hours; and when it is full, the tank can be drained by a third pipe in 4 hours. If the tank is empty and all three pipes are open, in how many hours will the tank be filled?
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A tank can be filled by one pipe in 3 hours and by a second pipe in 5 hours; and when it is full, th...
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