Pipes A and B can fill a tank in 10 hours and \(13\frac{1}{3}\) hours, respectively. Pipe C is an emptying pipe. When all three pipes are opened together, the tanks is filled in 8 hours. Pipe C alone can empty 60% part of the tank in:

Pipes A and B can fill a tank in 10 hours and \(13\frac{1}{3}\) hour

1.	Pipes A and B can fill a tank in 10 hours and \(13\frac{1}{3}\) hours, respectively. Pipe C is an emptying pipe. When all three pipes are opened together, the tanks is filled in 8 hours. Pipe C alone can empty 60% part of the tank in:
A.	12 hours
B.	15 hours
C.	9 hours
D.	10 hours
Answer» B. 15 hours

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Pipes A and B can fill a tank in 10 hours and \(13\frac{1}{3}\) hours, respectively. Pipe C is an emptying pipe. When all three pipes are opened together, the tanks is filled in 8 hours. Pipe C alone can empty 60% part of the tank in:

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