Pipes A and B can fill a tank in 12 hours and 15 hours respectively, while pipe C can empty the full tank in 20 hours. If all three pipes are opened…
Pipes A and B can fill a tank in 12 hours and 15 hours respectively, while pipe C can empty the full tank in 20 hours. If all three pipes are opened together, the tank will be filled in:
Show answerHide answer
Correct answer: (D) 10 hours