It usually takes 8 hours to fill a tank; But due to a leak in its bott – McqOptions

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1.	It usually takes 8 hours to fill a tank; But due to a leak in its bottom, it takes 2 hours more to fill it. If the tank is full, how long will it take for it to be emptied by the leak?
A.	40
B.	54
C.	12
D.	78
Answer» B. 54

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