Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24

1.	Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?
A.	8 (5/13) hrs
B.	8 (4/13) hrs
C.	7 (4/13) hrs
D.	8 (6/13) hrs
Answer» C. 7 (4/13) hrs

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Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

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