Question

Pls help. asap.

find the surface area of the cone in terms of



11cm 10cm

Answer 1

if the base of the cone is 10, that means its radius is half that, or 5.

`\textit{surface area of a cone}\\\\ SA=\pi rs + \pi r^2~~ \begin{cases} r=radius\\ s=slant~height\\[-0.5em] \hrulefill\\ r=5\\ s=11 \end{cases}\implies SA=\pi (5)(11)+\pi (5)^2 \\\\\\ SA=55\pi +25\pi \implies SA=80\pi ~cm^2`