Question

A right cylinder has a radius of 3 and a height of 12. What is its surface area? O A. 72 units O B. 90 units O c. 45rt units O D. 108r units​

Answer 1

`A=72\pi\ units^2`

Explanation:

Given that,

The radius of the cylinder, r = 3

Height of the cylinder, h = 12

We need to find the surface area of the cylinder. The formula for the surface area of a cylindrical object is given by :

`A=2\pi rh\\\\=2* \pi* 3* 12\\\\=72\pi\ units^2`

So, the surface area of the cylinder is equal to
`72\pi\ units^2`.