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29 April, 16:01

An experienced shipping clerk can fill a certain order in 4 hours. A new clerk needs 5 hours to do the same job. Working together, how long will it take for them to fill the order?

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  1. 29 April, 19:11
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    If they work together, they will take 2 2/9 hours to fill the order

    Step-by-step explanation:

    An experience clerk can fill a certain order in 4 hours

    A new clerk needs 5 hours.

    How long will it take for them to fill the order?

    The first step, find how much order they can complete in an hour

    I will give an experieced clerk as A and the new clerk as B

    A can finish 1/4 order in an hour

    B can finisih 1/5 order in an hour

    Second, if they work together, so

    (1/4 + 1/5) order will be done in an hour

    1/4 + 1/5 = 5/20 + 4 / 20 = 9/20

    To complete the whole task, it will take:

    = 20/20 or 1 : 9/20

    = 1 x 20/9

    = 2 2/9 hour
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