Question

A wall of 100 m can be built by 7 men or 10 women in 10 days. How many days will 14 men and 20 women take to build a wall of 600 m?

Answer 1

wall created by 7 men in 10 days = 100 m

So wall created by 7 men in 1 day = 100/10 = 10 m

So wall created by 7 × 2 = 14 men in 1 day = 10 ×2 = 20m

wall created by 10 women in 10 days = 100 m

So wall created by 10 women in 1 day = 100/10 = 10m

And wall created by 10 ×2 = 20 women  in 1 day = 10 × 2 = 20 m

So wall created by 14 men and 20 women in 1 day = 20 + 20 = 40 m

so number of days required to complete  600m = 600/40 = 15 days

hence 14 men and 20 women will take 15 days to build a wall of 600 m.

Team work is important. Enjoy working together.