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A can do a piece of work in 28 days. B is 40% more efficient than A. Find the number of days taken by B to do the same piece of work.
- A20 days
- B19 days
- C18 days
- D17 days
Correct answer: A
Discussion 1
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CCommunity
20 days
A's one day's work = 1/28
B's one days's work
= 1/28 + 40% of 1/28 = 1/28 + 1/70 = 1/20
So, B will take 20 days to complete the work.
A's one day's work = 1/28
B's one days's work
= 1/28 + 40% of 1/28 = 1/28 + 1/70 = 1/20
So, B will take 20 days to complete the work.