An electric pump can fill a cistern in 6 hrs. Because of a leak in the cistern it took 7 hrs to fill the cistern. Ifthe cistern is full, how much time will the leak take to empty it?

An electric pump can fill a cistern in 6 hrs. Because of a leak in the

1.	An electric pump can fill a cistern in 6 hrs. Because of a leak in the cistern it took 7 hrs to fill the cistern. Ifthe cistern is full, how much time will the leak take to empty it?
A.	40 hrs
B.	42 hrs
C.	44 hrs
D.	46 hrs
Answer» C. 44 hrs

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An electric pump can fill a cistern in 6 hrs. Because of a leak in the cistern it took 7 hrs to fill the cistern. Ifthe cistern is full, how much time will the leak take to empty it?

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