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21 March, 09:13

It takes 36 minutes for 7 people to paint 4walls. How many minutes does it take 9 people to paint 7 walls?

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  1. 21 March, 09:39
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    The concept that can be used in order to determine the answer to this item is that of equating the man-hours for each walls.

    Case 1: (36 minutes) (7people) / 4 walls

    Simplifying,

    63 people-minutes/wall

    Using this calculated value for the next case,

    63 people-minutes/wall = (9 people) (x minutes) / 7 walls

    The value of x from the equation is 49 minutes.

    Thus, the answer is 49 minutes.
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