12 men of 15 women can do a work in 40 days. 8 men and 10 women can do the work in how many days?

12 men and 15 women can do a work in 6 days, and 6 men and 12 women can do it in 10 days, in how many days can 8 men and 10 women do the same work?

6 men and 8 women can do a work in 10 days.Then, 3 men and 4 women can do the same work in (A) 24 days (B) 20 days (C) 12 days (D) 18 days

If 5 men or 9 women can do a piece of work in 19 days. 3 men and 6 women will do the same work in how many days ?

6 men and 9 women can do a piece of work in 4 days.4 men and 3 women can do it in 8 days. In how many days can 20 men and 6 women do the same work ?

6 men and 9 women can do a piece of work in 4 days.4 men and 3 women can do it in 8 days. In how many days can 20 men and 6 women do the same work ?

12 men or 18 woman can do a work in 16 days. In how many days 12 men and 18 woman can do the work?