Hi!
The volume of cylinder is: V1 = B1 * H, where B1 = r^2 * pi
If the radius is doubled, then the volume is: V2 = B2 * H, where B2 = (2r)^2 * pi = 4 * r^2 * pi = 4 * B1 => V2 = 4 * B1 * H.
The answer is: If the radius is doubled, the volume will be 4 times bigger.
Hope this helps!
