Question

Suzanne wants to put a fence around her square garden. If the garden covers an area of `100` `ft^2`, how many feet of fencing does she need?

Answer 1

I found: `40ft`

Explanation:

If you have a square (garden) of side `x` you know that the area `A` is given as:
`A=100=x^2`
so that:
`x=sqrt(100)=10ft`

She need the perimeter `P` (basically the contour of the field) to find the length of the fence.

So:

`P=4*x=4*10=40ft` of fencing.