Question

Pipe ‘A’ takes 25 minutes to fill a tank. Pipe ‘B’ takes 40 minutes to empty the same tank. If pipe ‘B’ is opened 16 minutes after pipe ‘A’, then find the total time taken to fill the tank in this manner.

A 45 minutes
B 43 minutes
C 40 minutes
D 47 minutes
E 49 minutes
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