10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?

7

10 W = 7 days, so 5 W = 14 days

10 C = 14 days

Efficiency of 5W = 2

Efficiency of 10C = 2

Efficiency of 5W + 10C = 4

Total days required by 5W and 10C = \(\frac{28 }{ 4}\) = 7 days