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A does half as much works as B in three-fourths of the time. If together they take 18 days to complete a work, how much time shall B take to do it?
30 days
35 days
40 days
none of these
Let b cab do 6 unit in 1 day
So a will do 3 unit in 3/4 th day . So 4 unit in full day.
So ratio of efficiency is 4 :6 or 2:3
So b will take 18 / (3/5) = 30 day
Hence, option 1 is the correct answer.
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