SOLUTION: Jill can build a doll house in 58 mins working by herself. Jimmy can do it in 69 mins working by himself. How long will it take them to build one doll house working together?

Question 260644: Jill can build a doll house in 58 mins working by herself. Jimmy can do it in 69 mins working by himself. How long will it take them to build one doll house working together?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Jill can build a doll house in 58 mins working by herself. Jimmy can do it in 69 mins working by himself. How long will it take them to build one doll house
Jill does 1/58 part of the work in 1 min.
Jimmy does 1/69 part of the work in 1 minute.
They together will do (1/58)+ (1/69) part of the work in 1 min.
they will do 127/4002 part of the work in 1 minute. ( taking LCM of the two fractions)
So for 1 complete work they will do in 4002/127 minutes.
31.51 minutes.
M Ananth---------- mananth@hotmail.com
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