"A tank 9 ft by 5 ft by 2 ft is fitted with an inlet pipe and an exhaust pipe. The inlet pipe pours
Channel: Doubtnut
Date: 05/04/2020

"A tank 9 ft
 by 5 ft by 2 ft is fitted with an inlet pipe and an exhaust pipe. The inlet
 pipe pours in 576 cu. Inch of water per minute and the exhaust pipe can empty
 the full tank in 3 hours. If the tank is full and both pipes are open, how
 many hours will it take to empty it?"