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Question

A tap can fill a tank in 25 minutes and another tap can empty it in 50 minutes. If both are opened together simultaneously, then the tank will be filled in

A
20 minutes
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B
30 minutes
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C
40 minutes
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D
50 minutes
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Solution

The correct option is C 50 minutes
Part of the tank filled in 1 min =125

part of the tank get followed out in 1 min $= \dfrac{1}{50}$

Part of the tank filled when both the taps are opened simultaneously =(125150)=150

If both the taps are opened together, the tank will be filled in 50 minutes.

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