A pipe can fill a tank in x hours and another can empty it in y hours. In how many hours they together fill it in ( y > x) ? Options: A . &nbsp(x - y) hours B . &nbsp(y - x) hours C . &nbsp$$\left( {\frac{{xy}}{{x - y}}} \right)\,{\text{hours}}$$ D . &nbsp$$\left( {\frac{{xy}}{{y - x}}} \right){\text{hours}}$$

A pipe can fill a tank in x hours and another can empty it in y hours. In how ma

Question

A pipe can fill a tank in x hours and another can empty it in y hours. In how many hours they together fill it in ( y > x) ?

Options:

A . (x - y) hours

B . (y - x) hours

C . $$\left( {\frac{{xy}}{{x - y}}} \right)\,{\text{hours}}$$

D . $$\left( {\frac{{xy}}{{y - x}}} \right){\text{hours}}$$

Answer: Option D

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Question 1. A water tap fills a tub in 'p' hours and a sink at the bottom empties it in 'q' hours. If p < q and both tap and sink ar....'r' hours, then the relation between p, q, r :

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Question 3. Having the same capacity 9 taps fill up a water tank in 20 minutes. How many taps of the same capacity are required to f....fill up the same water tank in 15 minutes ?

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Question 5. Pipe A can fill the tank in 8 hours and pipe B can fill it in 12 hours. If pipe A is opened at 7:00 AM and pipe B is ope....then at what time will the tank be full ?

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Question 7. Three pipes A, B and C can fill a tank in 6 hours, 9 hours and 12 hours respectively. B and C are opened for half an hou....to fill the remaining part of the tank is -

Question 8. A tap drips at a rate of one drop/second. 600 drops make 100 ml. The number of liters wasted in 300 days is -....

Question 9. Two pipes A and B can fill a cistern in `37 1/2` minutes....

Question 10. Two pipes can fill a tan in 20 and 24 minutes respectively and....

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