Question

Find the surface area of the cylinder.
type an exact answer in terms of pi.
radius = 3.5
height = 12

Answer 1

$\bf \textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=3.5\\ h=12 \end{cases}\implies SA=2\pi (3.5)(12+3.5) \\\\\\ SA=7\pi (15.5)\implies SA=108.5\pi$