SOLUTION
Given the question, the following are the solution steps to answer the question.
STEP 1: Find the area of the square
[tex]\begin{gathered} 2\times\text{ Area of the square}=72mi^2 \\ Divide\text{ both sides by 2} \\ \frac{2\times Area\text{ of the square}}{2}=\frac{72}{2} \\ Area\text{ of the square}=36mi^2 \end{gathered}[/tex]STEP 2: Find the length of each side of the square
[tex]\begin{gathered} Area=length^2=36mi^2 \\ Find\text{ the square root of both sides} \\ \sqrt{length^2}=\sqrt{36mi^2} \\ length=6mi \end{gathered}[/tex]Hence, the length of each side of the square is 6mi
