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One might find the mathematical equation for the surface area of a sphere in a mathematics textbook. One might also find the equation at online math study groups.
Surface area of a sphere with radius r = 4(pi)r2
There is NO equation for the area of a sphere Assuming you mean surface area, the surface area of a sphere of radius r is 4πr^2.
use algebra to find the radius, then plug the height and radius into the surface area equation
Surface Area = pi*r*(r + h) When you substitute for pi and h you will get a quadratic equation in r.