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30 July, 22:32

Yumi picks up litter for 3 miles and takes two hours longer than juan, who picks up litter for 2 miles. if it took juan x hours, how long did it take yumi?

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  1. 31 July, 00:14
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    Yumi picks up litter for 3 miles and takes two hours longer than juan, who picks up litter for 2 miles.

    if it took juan x hours, his rate is 2/x

    So it took Yumi x+2 hours, her rate is 3 / (x+2)

    Because both them have same rate 2/x=3 / (x+2)

    2 (x+2) = 3x

    x = 4

    It takes Yumi 6 hours.
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