The volume of a sphere is 32 3 π cubic centimeters. What is the radius? Sphere V = 4 3 πr3 1. Substitute 32 3 into the volume formula for V: 32 3 π = 4 3 πr3 2. Multiply both sides of the equation by 3 4 : 8π = πr3 3. Divide both sides of the equation by π. 8 = r3 4. Take the cube root of both sides: 3√8 = r The radius of the sphere is cm.