Question

Find the surface area of a cone with 9 in radius and 13 in height​

Answer 1

`\bf \textit{surface area of a cone}\\\\ SA=\pi r√(r^2+h^2)+\pi r^2~~ \begin{cases} r=radius\\ h=height\\ \cline{1-1} r=9\\ h=13 \end{cases}\implies SA=\pi (9)√(9^2+13^2)+\pi (9)^2 \\\\\\ SA=9\pi √(250)+81\pi \implies SA=9\pi (√(250)+9)\implies SA\approx 701.53`