neezynee neezynee

13-04-2017
Mathematics

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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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wolf1728 wolf1728

13-04-2017

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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