Question

What is the volume of a cylinder with base radius 2
and height 9?

Answer 1

The volume is 144
`\pi`.

Explanation:

In order to calculate the volume of a cylinder, you have to find the area of it's base. Because a cylinder's base is a circle, you use the formula A=
`\pi r{2}`. Substituting in the radius's length would be A=
`\pi (4){2}`, which is A=16
`\pi`. Now that we know the base area of the cylinder, we multiply it by the height, which is 9 to calculate the volume. Therefore, the volume of the cylinder would be 9×16
`\pi`, which is 144
`\pi`.

Answer 2

18

Explanation:

volume= r × h = 2 × 9= 18