Question

what is the formula used to find the surface area of a sphere​

Answer 1

The formula for the circumference of a circle of radius R is 2*Pi*R. Similarly, the volume of a ball enclosed by a sphere of radius R is (4/3)*Pi*R3. And the formula for the surface area of a sphere of radius R is 4*Pi*R2.

Hope it is helpful

Answer 2

$4\pi {r}^{2}$

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