Pipes A and B can fill a tank in 20 hours and 30 hours respectively, whereas pipe C alone can empty the full tank in 10 hours. Pipes A and B are opened together for \(3\frac{1}{2}\) hours and then closed. If pipe C is opened, It will empty the tank in:

Pipes A and B can fill a tank in 20 hours and 30 hours respectively, w

1.	Pipes A and B can fill a tank in 20 hours and 30 hours respectively, whereas pipe C alone can empty the full tank in 10 hours. Pipes A and B are opened together for \(3\frac{1}{2}\) hours and then closed. If pipe C is opened, It will empty the tank in:
A.	2 hours 15 minutes
B.	2 hours
C.	2 hours 55 minutes
D.	2 hours 45 minutes
Answer» D. 2 hours 45 minutes

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Pipes A and B can fill a tank in 20 hours and 30 hours respectively, whereas pipe C alone can empty the full tank in 10 hours. Pipes A and B are opened together for \(3\frac{1}{2}\) hours and then closed. If pipe C is opened, It will empty the tank in:

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