Pipe A and Pipe B can fill a tank in 20 minutes and 10 minutes respectively. Pipe C can empty the tank in 15 minutes. If the three pipes are opened simultaneously, find the

Pipe A and Pipe B can fill a tank in 20 minutes and 10 minutes resp

1.	Pipe A and Pipe B can fill a tank in 20 minutes and 10 minutes respectively. Pipe C can empty the tank in 15 minutes. If the three pipes are opened simultaneously, find the
A.	12
B.	15
C.	20
D.	18
Answer» B. 15

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Pipe A and Pipe B can fill a tank in 20 minutes and 10 minutes respectively. Pipe C can empty the tank in 15 minutes. If the three pipes are opened simultaneously, find the

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