A pump can fill a tank in 4 hours, but due to a leak, the tank now gets filled in 5 hours. How long will it take the leakage to empty the tank when it is full?

A pump can fill a tank in 4 hours, but due to a leak, the tank now get

1.	A pump can fill a tank in 4 hours, but due to a leak, the tank now gets filled in 5 hours. How long will it take the leakage to empty the tank when it is full?
A.	9 hours
B.	4.5 hours
C.	20 hours
D.	1 hour
Answer» D. 1 hour

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A pump can fill a tank in 4 hours, but due to a leak, the tank now gets filled in 5 hours. How long will it take the leakage to empty the tank when it is full?

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