### Home > INT2 > Chapter 11 > Lesson 11.1.2 > Problem11-20

11-20.

The radius of a cylinder is $6.0$ inches and the height is $9.0$ inches.

$5A = 2 \pi r^2 + 2 \pi rh$
$V = \pi r^2h$

1. What is the surface area of the cylinder?

$2\pi 6^2 + 2\pi (6)(9)$

2. What is the volume of the cylinder?

$324\pi \: \text{in}^3$

3. If the cylinder is enlarged by a linear scale factor of $3$, what is the volume of the enlarged cylinder? How do you know?

Use the results from 11-14 part (c).