7 men and 9 women can do a piece of work in 20 days, while 20 men and 15 women can do the same work in 8 days then in how many days 21 men and 27 women can do that work?
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Below code works on android only :
Answer:
20/3
Step-by-step explanation:
We use MDH in such cases . MDH means Man, Days , Hours .
(7M +9W)×20 = (20M + 15W)×8 ...............(1)
35M + 45W = 40M + 30W
15W = 5M
3W = 1M
This means, from (1) :
(30W) * (20) = (21*3 + 27)W × Days
Days = 20/3
[Since 1 M efficiency = 3 Woman efficiency]
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