Question

The radius of the base of a cylinder is 28 cm and its height is 48 cm. Find the surface area of the cylinder in terms of π. 4,232π cm2 4,256π cm2 4,208π cm2 4,228π cm2

Answer 1

$\bf \textit{total surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\ -----\\ r=28\\ h=48 \end{cases}\implies SA=2\pi (28)(48+28) \\\\\\ SA=56\pi (76)\implies SA=4256\pi$