SOLUTION: If a man can do a piece of work in 15 days & another person does the same work in 20 days.How much work is left after 4 days if they work together?
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Question 830765: If a man can do a piece of work in 15 days & another person does the same work in 20 days.How much work is left after 4 days if they work together? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 1-4/15-4/20=8/15 left to do
or
7/15x=4
x=60/7
x = 8.5714 days to to the whole job
4.5714 days more work
or
1/15+1/20=1/x
x=60/7
x = 8.5714 days to to the whole job
4.5714 days more work
