Question

The area of a circle is 25 in. What is it’s radius?

Answer 1

$\bf \textit{area of a circle}\\\\ A=\pi r^2~ \begin{cases} r=radius\\ -----\\ A=25 \end{cases}\implies 25=\pi r^2\implies \cfrac{25}{\pi }=r^2 \implies \sqrt{\cfrac{25}{\pi }}=r$