SOLUTION: Martha can rake the leaves in her yard in 4 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together?
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Question 281522: Martha can rake the leaves in her yard in 4 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together? Answer by checkley77(12844) (Show Source):
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