MathematicsWhich of the following is the formula for the surface area of a sphere?

Which of the following is the formula for the surface area of a sphere?

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A
$4 π r^{2}$
B
$4 πr$
C
$2 π r^{2}$
D
$\frac{1}{2} π r^{2}$

Solution:

Here, we need to find the formula for the surface area of a sphere.
The surface area of a sphere is exactly four times the area of a circle with the same radius.
Also, area of circle