Answer:
[tex]r = 2x[/tex]
Step-by-step explanation:
The volume of the cylinder is given by the following formula:
[tex]V = \pi\cdot r^{2}\cdot h[/tex]
By comparing each variable, height and radius of the cylinder are, respectively:
[tex]h = x[/tex]
[tex]r = 2x[/tex]