SOLUTION: A and B can do a piece of work in 40/3 days. A alone can do the work in 20 days. How long will B take it??
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Question 318978: A and B can do a piece of work in 40/3 days. A alone can do the work in 20 days. How long will B take it??
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A & B can do a job in 40/3 days
so they do 3/40 of the job in 1 day.
..
A does in 20 days.
he does 1/20 of the job in 1 day
..
3/40-1/20 = 3-2 /40
=1/40 of the jobin 1 day
So B does the job in 40 days.
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