Answer :
[tex]\bf \textit{area of a square}\\\\ A=s^2~~ \begin{cases} s=side's\\ \qquad length\\[-0.5em] \hrulefill\\ A=58000 \end{cases}\implies 58000=s^2\implies \sqrt{58000}=s \\\\\\ 240.83\approx s~\hspace{9em} \boxed{240}\rule[0.35em]{10em}{0.25pt}240.83\rule[0.35em]{1.7em}{0.25pt}\boxed{241}[/tex]