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Mathematics 11 Online
OpenStudy (anonymous):

Jack usually mows the lawn in 5 hours. Marilyn can mow the same yard in 4 hours. How much time would it take to mow the lawn together?

OpenStudy (anonymous):

about 2.5 hours.

OpenStudy (cwrw238):

1/4 + 1/5 = 1/x solve for x

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