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10 October, 01:29

Working together, melissa and jing can mow a lawn in 5 hours. It would take melissa 8 hours to do the job alone. What is the value of r, the part of the lawn that king could complete in 1 hour?

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  1. 10 October, 02:12
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    Total Time = (M x K) / (M + K)

    5 = (8 x K) / (8 + K)

    40 + 5 K = 8K

    40 = 3K

    King can do the job in 13.33 Hours

    King could mow (1 / 13.33) of the lawn in one hour.
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