1.

Two pipes A and B can fill a tank in 10 hours and 30 hours respectively. Due to a leak in the tank, it takes 2.5 hours more to fill the tank. How much time would the leak alone will take to empty the tank ?

A. 20 hours
B. 25 hours
C. 30 hours
D. 35 hours
Answer» D. 35 hours


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