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11 February, 09:47

An inlet pipe can fill an empty swimming pool in 5 hours, and another inlet pipe can fill the pool in 2 hours. How long will it take both pipes to fill the pool?

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  1. 11 February, 11:29
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    1.42 hours

    Step-by-step explanation:

    In this case we must take into account that the speed would be to fill a pool for a time, that this case is in hours, therefore it would be like this:

    1/5 for the first pipe

    1/2 for the second pipe

    Now, we will use both at the same time, therefore:

    1/5 + 1/2 = 1 / x

    0.7 = 1 / x

    x = 1 / 0.7

    x = 1.42

    That is to say that if we use both we will take a total of 1.42 hours
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