Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, how long will it take to fill the tank?

Two pipes A and B can fill a tank in 12 and 24 minutes respectively. I

1.	Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, how long will it take to fill the tank?
A.	9 min
B.	8 min
C.	4 min
D.	6 min
Answer» C. 4 min

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Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, how long will it take to fill the tank?

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