The formula for the surface area of a sphere is 4 (pi) r2
For a radius of 4, the surface area is
4 (3.1416) (4)2 = 4 (3.1416)(16) = about 201.06 square units
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The total surface area of a sphere when the radius is 4 equals 201.1 units2
That is correct because the surface area of a sphere is: 4*pi*radius squared
If its radius is 6, then the surface area of the sphere is: 4*pi*6*6 = 144*pi square units.
The surface area of every sphere is (4 pi) times (the radius squared).Knowing that, you can find the surface area of not only the one you'reasking about right now, but of every sphere that ever was, is, or will be !
The surface area of a 12-inch diameter sphere is 452.39 square inches.The formula for surface area of a sphere is 4*pi*r2 where r=radius