A fence needs to be put up to create a safe work area. The fenced area needs to be 40m x 60m. What is the length of fencing required?

Imagine a square of 40mx60m

Such a square has two sides of 40m and two sides of 60m

 

Therefore the total length of all the sides would be

 

40+40+60+60 = 200m

 

A fence of 200m would therefore be needed.