Question

A field is in the shape of a square with side $20m$. A pathway of $2m$ width is surrounding it. Find the outer perimeter of the pathway

Answer 1

Side of a square is $20m$

Pathway of width $2m$ is surrounding the square on all sides.

So, length of the side of the outer square $=$ Length of side of square $+2\times$ width of pathway $=(20+2+2)=24m$.
Hence, outer perimeter $=4\times 24=96m$.