Pipe A can completely fill an empty tank in 11 hours. Pipe B can empty the same completely filled tank in 15 hours. If they are opened together, in how much time the empty tank will get filled?

Pipe A can completely fill an empty tank in 11 hours. Pipe B can empty

1.	Pipe A can completely fill an empty tank in 11 hours. Pipe B can empty the same completely filled tank in 15 hours. If they are opened together, in how much time the empty tank will get filled?
A.	39 hours 15 minutes
B.	49 hours 45 minutes
C.	41 hours 15 minutes
D.	47 hours 30 minutes
Answer» D. 47 hours 30 minutes

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Pipe A can completely fill an empty tank in 11 hours. Pipe B can empty the same completely filled tank in 15 hours. If they are opened together, in how much time the empty tank will get filled?

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