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?

(x - y) hours
(y - x) hours
$$\frac{{xy}}{{x - y}}$$ hours
$$\frac{{xy}}{{y - x}}$$ hours

LohaHridoy

6 views

2025-01-04 04:42

1 Answers

AhmedNazir

Answer: Option 4

Net part filled in 1 hour $$\eqalign{ & {\text{= }}\left( {\frac{1}{x} - \frac{1}{y}} \right) \cr & = \left( {\frac{{y - x}}{{xy}}} \right) \cr} $$ ∴ The tank will be filled in $$ = \left( {\frac{{xy}}{{y - x}}} \right)\,\,{\text{hours}}$$

6 views Answered 2022-09-01 13:21

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