Equate the volume of sphere to volume of right cylinder, substitute 3 in for the cylinder height, and solve for r .
Sphere V=4/3 * pi*r^3
Cylinder V=pi*r^2*h
Equate the volume of sphere to volume of right cylinder, substitute 3 in for the cylinder height, and solve for r .
Sphere V=4/3 * pi*r^3
Cylinder V=pi*r^2*h
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