A pipe can fill a tank in x hours and another pipe can empty it in y (y

Question

A pipe can fill a tank in x hours and another pipe can empty it in y (y > x) hours. If both pipes are open, in how many hours will the tank is filled?

Options:

A . (x - y) hours

B . (y - x) hours

C . $$\frac{{xy}}{{x - y}}$$ hours

D . $$\frac{{xy}}{{y - x}}$$ hours

Answer: Option D

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