A and B together can do a piece of work in 6 2/3 days and B alone can do it in 10 days. How long will A take to do it alone?
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Answer: 20 days
Step-by-step explanation:
A and B do a work together in 20/3 days. Therefore, they do 3/20 of the work in one day.
B will take 10 days to complete the work. Therefore, B will do 1/10 of the work in one day.
Work done by A in one day= total worm done in one day-work done by B in one day
=3/20 - 1/10
=3/20-2/20
=1/20
If A does 1/20 of the work one one day, it will take 20 days to complete the entire work.
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