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

A pump can fill a tank in 4 hrs, but due to a leak, the tank now gets

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

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

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