Pipes A and B can fill a tank in 30 minutes and \(37\frac{1}{2}\)minutes, respectively. C is an outlet pipe. When all the three pipes are opened together, then the tank is full in 25 minutes. In how much time (in minutes) can C alone empty \(\frac{2}{5}th\) part of the tank?

Pipes A and B can fill a tank in 30 minutes and \(37\frac{1}{2}\)minu

1.	Pipes A and B can fill a tank in 30 minutes and \(37\frac{1}{2}\)minutes, respectively. C is an outlet pipe. When all the three pipes are opened together, then the tank is full in 25 minutes. In how much time (in minutes) can C alone empty \(\frac{2}{5}th\) part of the tank?
A.	24 minutes
B.	30 minutes
C.	20 minutes
D.	25 minutes
Answer» D. 25 minutes

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Pipes A and B can fill a tank in 30 minutes and \(37\frac{1}{2}\)minutes, respectively. C is an outlet pipe. When all the three pipes are opened together, then the tank is full in 25 minutes. In how much time (in minutes) can C alone empty \(\frac{2}{5}th\) part of the tank?

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