If 10 men and 15 women can do a piece of work in 8 days and 9 men and 12 women can do it in 9 days. How many days will 5 men and 15 women take to do it?
14.4 days
In one day 1 man can do m & 1 woman can do w equivalent of the job, then we have: 10m+15w =1/8 ------ (1) 9m+12w=1/9 ------ (2)
5m+15w=1/x
Comparing (1) & (2) we get 1m=12w and w=1/1080 x=1/(5m+15w)=1/75w=1080/75=14.4 x= 14.4 days
If 11 men and 16 women can do a piece of work in 6 days and 7 men and 9 women can do it in 10 days. How many days will 15 women and 5 men take to do it?
If 6 men and 10 women can do a piece of work in 15 days and 5 men and 9 women can do it in 17 days. How many days will 5 men and 12 women take to do it?
If 17 men and 18 women can do a piece of work in 11 days and 14 men and 13 women can do it in 15 days. How many days will 27 men and 18 women take to do it?
10 men and 15 women complete half of the work in 12 days and 6 men and 15 women complete one third of the work in 10 days. How many days are required to complete the same full work by taking 10 men and 30 women?
If 6 men and 8 women can do a piece of work in 10 days and 4 men and 7 women can do it in 12 days, how many days will 4 men and 12 women take to do half of work?
