10 men & 15 women need 6 days to do a job. 1 man need 100 days to do the job. How many days does 1 woman need?
The answer is supposed to be 225. I don't know how it's coming. Pls explain.
- 1 decade agoFavorite Answer
Let a woman take x days to complete the job
amount of work done by 1 woman in 1 day = 1/x
amount of work done by 15 women in 1 day = 15/x..........(1)
1 man takes 100 days to complete the job
Amount of work done by 1 man in 1 day = 1/100
Amount of work done by 10 men in 1 day = 10/100= 1/10 ....(2)
10men & 15 women take 6 days to complete the job
amount of work done by them in one day = 1/6 ..........(3)
from (1), (2) & (3) we get
(15/x) + (1/10) = 1/6
(150 + x )/10x = 1/6
900 + 6x = 10x
4x = 900
x = 225
No. of days taken by 1 woman = 225 days
- ?Lv 71 decade ago
Assuming for the sake of the problem that all men do the same amount of work and all women do the same amount of work, and making certain other assumptions about men and women, ...
Let m = the work one man does per day, and
Let w = the work one woman does per day.
It takes a certain amount of work to complete the job, and we're told that this amount of work is 100m, and it's also 6(10m + 15w). So,
6(10m + 15w) = 100m
40m = 90w. So,
100m = 225w.
So, it takes one of these women 225 days to complete the job.
- Anonymous1 decade ago
- 1 decade ago
60 - sixty
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- 1 decade ago
ask from those women