Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is :

Two pipes A and B can fill a tank in 20 minutes and 30 minutes respect

1.	Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is :
A.	50 minutes
B.	12 minutes
C.	25 minutes
D.	15 minutes
Answer» C. 25 minutes

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Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is :

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