11. A and B can together finish a work in30 days. They worked at it for 20 days and then Bladem
remaining work was done by A alone in 20 more days. In how many days can A alone do it
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- Solution:
As A and B takes 30days to complete 1 work.
Therefore, A + B = 30days
They worked for 20 days.
It means 1 people takes double days as
worked by together.
Therefore A = 2× 20 = 40days
A worked for 20 days more .
Therefore,
No. days required by A = 40 + 20= 60 days.
In 60 days A can do it.
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