A water tank is 2/5th full pipe A can fill the tank in 10 minutes and the pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?

A water tank is 2/5th full pipe A can fill the tank in 10 minutes a

1.	A water tank is 2/5th full pipe A can fill the tank in 10 minutes and the pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?
A.	6 minutes to empty
B.	6 minutes to fill
C.	9 minutes to empty
D.	9 minutes to fill
Answer» B. 6 minutes to fill

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A water tank is 2/5th full pipe A can fill the tank in 10 minutes and the pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?

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