The ratio of work efficiency of a man and a woman is `3:2`. A woman can do a work in 30 days. In how many can 4 men and 4 women do the 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?

2 men and 3 women can do a piece of work in 16 days . In how many days can 4 men and 6 women do the same work?

If 12 men or 20 women can do a work in 54 days, then in how many days can 9 men and 12 women together do the work?

3 men or 4 women can do a piece of work in 43 days. In how many days 7 men & 5 women can do the same work ?

If 78 men can do a work in 140 days, in how many days will 42 men do the same work ?

When 6 men and 8 women can do a piece of work in 15 days, then 11 men and 16 women can do the same work in 8 days. In how many days can 4 men and 4 women do the work ?

If 12 men or 18 women can do a work in 14 days,then in how many days will 8 men and 16 women do the same work?

If 4 men or 7 women can do a work in 60 days, then in how many days will 8 men and 7 women finish the same work?

If 3 men or 6 women can do a piece of work in 16 days, in how many days can 12 men and 8 women do the same piece of work?