or
or
If 9 men or 15 women can do a work in 16 days, how long it take 3 men and 7 women to complete the job?
9 men = 15 Women = 16 days
3 Men = 5Women
So 3Men & 7 Women = 12 Women
15 Women can do the work in 16 days
12 Women can do the work in 15 x 16 / 12 = 20 days Ans
