A tank is 3/5 full. Pipe A can fill a tank in 10 min and Pipe B can empty it in 6 min. If both the pipes are left open, how long will it take to empty the tank completely?

A tank is 3/5 full. Pipe A can fill a tank in 10 min and Pipe B can em

1.	A tank is 3/5 full. Pipe A can fill a tank in 10 min and Pipe B can empty it in 6 min. If both the pipes are left open, how long will it take to empty the tank completely?
A.	12 min
B.	5 min
C.	7 min
D.	9 min
Answer» E.

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A tank is 3/5 full. Pipe A can fill a tank in 10 min and Pipe B can empty it in 6 min. If both the pipes are left open, how long will it take to empty the tank completely?

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