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22 June, 09:10

Bobbi can mow the park in 3 hours and Deshaun can do the same job in 7 hours. How long will it take them to mow the park

if they work together? Round your answer to the nearest tenth and include units.

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  1. 22 June, 10:42
    0
    2.1 hours (2 hours and 6 minutes)

    Step-by-step explanation:

    The rate of work of Bobbi is ⅓ while for Deshaun is 1/7 hence combined rate will be

    ⅓+1/7 = (7+3) / 21=10/21

    The equivalent hours is the reciprocal of the above hence 1021/10=2.1 hours

    0.1 of an hour is equivalent to 0.1*60=6 minutes

    Therefore, the efforts combined will take 2.1 hours or 2 hours and 6 minutes
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