Doubling the radius quadruples the volume.
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The volume increases by a factor of four.
volume=pi*radius squared*height/3, where radius is the radius of the cylinder (and will be the radius of the base of the cone),and height is the lenth of the cylinder.
Radius
The volume of a sphere is proportional to R3 .So doubling the radius causes the volume to increase by a factor of 23 = 8 .
The volume of a cylinder that has a radius of 6 and a height of 8 is: 226.2 units3