Two pipes P and Q take 1/4 hr and 1/3 hr respectively to fill a tank. The two pipes are opened simultaneously but P is turned off after sometime. The tank takes 12 minutes to get full after this. Find the time for which Pipe P was open.

Two pipes P and Q take 1/4 hr and 1/3 hr respectively to fill a tank.

1.	Two pipes P and Q take 1/4 hr and 1/3 hr respectively to fill a tank. The two pipes are opened simultaneously but P is turned off after sometime. The tank takes 12 minutes to get full after this. Find the time for which Pipe P was open.
A.	3.42 minutes
B.	4.6 minutes
C.	5.4 minutes
D.	8.11 minutes
Answer» B. 4.6 minutes

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Two pipes P and Q take 1/4 hr and 1/3 hr respectively to fill a tank. The two pipes are opened simultaneously but P is turned off after sometime. The tank takes 12 minutes to get full after this. Find the time for which Pipe P was open.

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