Takes Mary 3 Hours To Paint The House And Joe 10 Hours How Long Will Take Both To Paint The House?
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Mary paints 1/3 house/hour. Joe paints 1/10 house/hour.
Together, they paint 1/3 + 1/10 = 13/30 house/hour.
It will take them (1 house)/(13/30 house/hour) = 30/13 hour to paint 1 house.
That is 2 4/13 hours.
Together, they paint 1/3 + 1/10 = 13/30 house/hour.
It will take them (1 house)/(13/30 house/hour) = 30/13 hour to paint 1 house.
That is 2 4/13 hours.
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