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7 May, 02:27

If 6 men can do a piece of work in 7 days, in how many men are needed to do the work in 21 days?

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  1. 7 May, 05:22
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    6:7

    x:21

    Proportion: x/6=21/7

    x/6=3

    x=18

    18 men are needed.
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