Question

A right cylinder has a radius of 3 and a height of 12. What is its surface area?A. 72 pi units2B. 108pi units2C. 45pi units2D. 90pi units2

Answer 1

The surface area of a right circular cylinder with radius 'R' and height 'H' is given by,

`S=2\pi R(R+H)`

According to the given problem,

`\begin{gathered} R=3\text{ units} \\ H=12\text{ units} \end{gathered}`

Substitute the values to get the surface area,