3 men and 7 women can do a job in 5 days, while 4 men and 6 women can do it in 4 days. The number of days required for a group of 10 women working together, at the same rate as before, to finish the same job in

Explanation:

(3men+7women)×5days

= (4men+6women)×4days

1 man = 11 women

3men+7women

= (3×ll)women+7women

= 40 women

40 women can do a work in 5 days

1 woman can do a work in 5×40days

10 woman can do a work in 5×40\10

=20 days