Using the radius, the formula is: V = 4/3(PI*r3)
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Volume of sphere is 5575.28 cubic units and its radius work out as 11 units rounded
Because when working out volumes the answer is given in cubic units and the radius in the formula for finding the volume of a sphere is cubed: Volume of a sphere in cubic units = 4/3*pi*radius3
The area of a sphere is equal to its circumference times its diameter.There are a variety of ways to work out this formula, most of them involving calculus.(See the links for the volume of a sphere).
A sphere with a radius of 7cm has a volume of 1,436.76cm3
Volume of a sphere = 4/3*pi*radius3