Question

if 3 men or 4 women can plough a field in 43 days, how long will 7 men and 5 women take to a plough it ?

Answer 1

3 men or 4 women can plough the field in 43 days.

3 men = 4 women.

1 man = 4/3 women.

7 man = 28/3 women.

7 men and 5 women = 5 + (28/3) = 43/3 women.

4 women can plough field in 43 days.

So,

1 women can plough in = 43 *4 days.

Hence,

43/3 women can plough = (43*4 *3) /43 = 12 days.