bopi wrote:
w women can finish in d days.
w+n women can finish work in x days
w ----d
w+n---x
x= (w+n)d/w
E is the answer
w+n women can finish work in x days
w ----d
w+n---x
x= (w+n)d/w
E is the answer
Please note that the correct answer is A, not E.
If w women can do a job in d days, then how many days will it take (w + n) women to do the job if all the women work at the same pace?
A. \frac{dw}{n+w}
B. \frac{n+w}{d}
C. \frac{n+w}{dw}
D. \frac{d}{n+w}
E. \frac{d(n+w)}{w}
The job consists of wd units of work (1 woman does 1 unit of work in 1 day).
Thus w + n women will take \frac{wd}{w+n} days to do the job.
Answer: A.
Hope it's clear.