Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the talk will be filled in :

Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C

1.	Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the talk will be filled in :
A.	3 9/17 hrs
B.	4 9/19 hrs
C.	5 2/17 hrs
D.	4 8/17 hrs
Answer» B. 4 9/19 hrs

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Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the talk will be filled in :

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