A tank can be filled in 9 hours. Because of a leak, it takes 10 hours to fill. In how much time will the leak alone empty the full tank?

A tank can be filled in 9 hours. Because of a leak, it takes 10 hours

1.	A tank can be filled in 9 hours. Because of a leak, it takes 10 hours to fill. In how much time will the leak alone empty the full tank?
A.	75 hours
B.	80 hours
C.	60 hours
D.	90 hours
Answer» E.

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A tank can be filled in 9 hours. Because of a leak, it takes 10 hours to fill. In how much time will the leak alone empty the full tank?

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