A 10-hectare field is worked combinedly by 4 children, 2 men, and 3 women in 10 days. If the efficiency of the persons reaping the field is in the ratio of 2: 5: 4, find the time taken by 7 children, 6 men, and 4 women to combinedly reap a 16-hectare field?
1
12 days
2
9 days
3
8 days
4
6 days