Question

Find the surface area of a cylinder with radius five and height four

Answer 1

It is given that the radius is 5 and height is 4.

To determine the surface area of cylinder

$S=2\pi rh+2(\pi)r^2^{}$$S=2\pi\times5\times4+2\pi\times5\times5=40\pi+50\pi=90\pi$

Hence the correct option is b.