Since the area has a square -shaped we can conclude that the area is given by:
[tex]A=l^2[/tex]Where:
l = Length of the side
For A = 228:
[tex]228=l^2[/tex]Solve for l:
[tex]\begin{gathered} l=\sqrt{228}m \\ l=2\sqrt{57}m \\ l\approx15.1m \end{gathered}[/tex]