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7 January, 18:27

It takes 21 minutes for 5 people to paint 7 walls. how many minutes does it take 3 people to paint 10 walls

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  1. 7 January, 21:10
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    21/7=3mins per wall with 5 people.

    Because we assume that all of the people paint at the same rate, 3 X 5=15 mins for one person working alone.

    15/3=5 mins per wall with 3 people X 10 people = 50 mins for 3 people to paint 10 walls.

    The answer is 50 mins.
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