Question

A cylinder with radius $r$ and height $h$ is closed on the top and bottom. Which of the following expressions represents the total surface area of this cylinder?

Answer 1

Given: Radius of cylinder is $r$ and height is $h$
$\because$ Total surface area of the cylinder
$=$ curved surface area $+2\times \text{base area}$
$=2\pi rh+2\pi r^2=2\pi r(r+h)$
Hence, option $\left(A\right)$ is the correct answer.