Question

The volume of a cylinder is 108π cm³ and its height is 12 cm.

Answer 1

Volume = pi*r^2
108*pi=pi*r^2
108=r^2 (pi's cancel out)
r= √108 or 6√3 or 10.4 cm

Hope this helps

Answer 2

Volume=pi*radius^2*height
108pi=12pi(radius)^2===> divide both sides by 12 pi
108pi/12pi=12pi/12pi(radius)^2
9=radius^2====>take the square of both sides
sqrt of 9= radius^2
3=radius
Thus, the radius of the cylinder is 3cm