SOLUTION: Martha can rake leaves in her yard in 8 hours. Her brother can rake leaves in 4 hours. How long will it take both of them to rake the one yard?
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Question 977339: Martha can rake leaves in her yard in 8 hours. Her brother can rake leaves in 4 hours. How long will it take both of them to rake the one yard? Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! Hi there,
1/a + 1/b = 1/x
1/8 + 1/4 = 1/x
3/8 = 1/x
8/3 = x
x = 2.67 hours (2 decimal places)
Hope this helps:-)
