Working together, Melissa and Jing can mow a lawn in 5 hours. It would take Melissa 8 hours to do the job alone.
1 answer:
Melissa’s speed = 1lawn/8hours
1/8 + x = 1lawn/5hours
1/5 - 1/8 =
8/40 - 5/40 = 3/40 = 1/13.3333333
Jing can mow 1 lawn in 13.3333333 hours.
1/13.333333 = r/1
Jing could mow 7.5% of the lawn in 1 hour.
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