10 women can complete a work in 7 days and 10 children

Solution

ATQ, we can say that 10 women can complete the work in 7 days. 70 women can complete the work in 1 day. Again, 10 children can complete the work in 14 days. 140 children can complete the work in 1 day. 70 women = 140 children 1 women = 2 children 5 women + 10 children (10 + 10) children = 20 children. Now, 140 children can complete the work in 1 day 20 children can complete in 140/20 = 7 days Alternate Solution: (10W) × 7 = (10 C ) ×14    So 1W=2C Now , (10W) × 7 = (5W+10 C ) × T (10 × 2) × 7 = (5 × 2+10 × 1 ) × T 140 = 20T T = 140/20 = 7 days