Pipe A and Pipe B can fill a tank in 20 minutes and 30 minutes respectively. Pipe C can empty the tank in 60 minutes. The tank is initially empty. Both the pipes A and B are

Pipe A and Pipe B can fill a tank in 20 minutes and 30 minutes resp

1.	Pipe A and Pipe B can fill a tank in 20 minutes and 30 minutes respectively. Pipe C can empty the tank in 60 minutes. The tank is initially empty. Both the pipes A and B are
A.	12 minutes
B.	13.5 minutes
C.	15 mintes
D.	14.5 minutes
Answer» C. 15 mintes

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Pipe A and Pipe B can fill a tank in 20 minutes and 30 minutes respectively. Pipe C can empty the tank in 60 minutes. The tank is initially empty. Both the pipes A and B are

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