If 10 men or 20 boys can make 260 mats in 20 days, then how many mats will be made by 8 men and 4 boys in 20 days?
260
Given 10 men makes 260 mats in 20days.
∴ 8 men will make 208 mats in 20days.
Similarly, 4 boys will make 52 mats in 20days.
∴ 8 men and 4 boys will make 260 mats in 20days.