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Question

Two faucets X and Y can fill a tank in 20 hours and 30 hours respectively. If both the faucets are opened together, the tank will be full in?



A

16 hrs

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B

20 hrs

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C

6 hrs

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D

10 hrs

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E

12 hrs

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Solution

The correct option is B

12 hrs


Time taken by X = 20 hours

Time taken by Y = 30 hours

Time taken by X and Y = 30×2030+20 = 12 hours


Quantitative Aptitude

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