Pipes A and B can fill a tank in 18 minutes and \(22\frac{1}{2}\) minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ______.

Pipes A and B can fill a tank in 18 minutes and \(22\frac{1}{2}\) min

1.	Pipes A and B can fill a tank in 18 minutes and \(22\frac{1}{2}\) minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ______.
A.	\(7\frac{1}{5}\;minutes\)
B.	\(8\frac{2}{5}\;minutes\)
C.	6 minutes
D.	5 minutes
Answer» B. \(8\frac{2}{5}\;minutes\)

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Pipes A and B can fill a tank in 18 minutes and \(22\frac{1}{2}\) minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ______.

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