SOLUTION: Jack usually mows his lawn in 6 hours. Marilyn can mow the same yard in 3 hours. How much time would it take for them to mow the lawn together?

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Question 261828: Jack usually mows his lawn in 6 hours. Marilyn can mow the same yard in 3 hours. How much time would it take for them to mow the lawn together?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
6*3/(6+3)
18/9=2 HOURS WHEN THEY WORK TOGETHER.