Question

The volume of a cylinder is 4pix^3 cubic units and its height is x units.

Which expression represents the radius of the cylinder, in units?

2x

4x

2pix^2

4pix^2

Answer 1

`r = 2x`

Explanation:

The volume of the cylinder is given by the following formula:

`V = \pi\cdot r^(2)\cdot h`

By comparing each variable, height and radius of the cylinder are, respectively:

`h = x`

`r = 2x`