pi(r2)of inner minus pi(r2) of outer. multiply height= volume
or you could drop it in a beaker and see how much water was displaced
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Volume = 4/3 * pi * radius * radius * radius Surface Area = 4 * pi * radius * radius
It depends on what information you have: its radius and slant height, radius and volume, radius and surface area, surface area and volume, etc.
V = (pi * radius * radius * height)/2 ie. formula for the volume of a cylinder divided by 2
divide the volume by 2*pi*r where r is the radius of the base
Volume of a sphere = (4/3) x (pi) x (Radius)3