Question

Lola wishes to build a fence around her rectangular backyard.
If the total length of the fence is 40 ft and if the length of the backyard is 12 ft, then find the width of the backyard.

Answer 1

Given:
Total length of the fence = 40 ft
Length of Lisa's backyard = 12 ft
Width of the backyard = ?

$\text{Perimeter =}2\times (Length+Width)$
$\text{40 =}2\times (12+Width)$
$\text{20 =}12+Width$
Width = 20 − 12
= 8 ft

Thus, the width of the backyard will be 8 ft.