A cistern is normally filled in 8 hrs but takes two hrs longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in_______________hrs.

A cistern is normally filled in 8 hrs but takes two hrs longer to f

1.	A cistern is normally filled in 8 hrs but takes two hrs longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in_______________hrs.
A.	50hrs
B.	20hrs
C.	40hrs
D.	None of these
Answer» D. None of these

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A cistern is normally filled in 8 hrs but takes two hrs longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in_______________hrs.

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