A Does 30% of a work in 30 days. He then
calls in B and they together finish the remaining
Work in 20 days. How long B alone would take
10 do the whole work?
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Answer:
60 days
Step-by-step explanation:
A and B together can finish a work in 30 days.
They can finish 1/30th of the work in one day.
In 20 days they can finish 20/30 work. That is 2/3 of the work.
Now 1/3 of the work is remained and A finished it in 20 days.
To finish 1/3 of a work A requires 20 days.
There are three 1/3rds in one whole work.
He requires 60 days to finish off that work alone.
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