A tank has two inlets which can fill it in 4 hours and 6 hours, respectively, an outlet can empty the full tank in 8 hours. Both inlet taps are opened for an hour and closed. Then the three pipes are opened together. The remaining part of the tank fills in:

A tank has two inlets which can fill it in 4 hours and 6 hours, respec

1.	A tank has two inlets which can fill it in 4 hours and 6 hours, respectively, an outlet can empty the full tank in 8 hours. Both inlet taps are opened for an hour and closed. Then the three pipes are opened together. The remaining part of the tank fills in:
A.	\(5\frac{1}{3}\) hours
B.	2 hours
C.	\(3\frac{1}{4}\) hours
D.	3 hours
Answer» C. \(3\frac{1}{4}\) hours

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A tank has two inlets which can fill it in 4 hours and 6 hours, respectively, an outlet can empty the full tank in 8 hours. Both inlet taps are opened for an hour and closed. Then the three pipes are opened together. The remaining part of the tank fills in:

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