Pipe A can fill a tank in 20 minutes and Pipe B in 30 mins and Pipe C – McqOptions

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1.	Pipe A can fill a tank in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If all of them work together, find the time taken to fill the tank?
A.	15 1/7 minutes
B.	12 1/7 minutes
C.	17 1/7 minutes
D.	10 1/7 minutes
Answer» D. 10 1/7 minutes

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