Question: Find the surface area of a sphere with a radius of 6 cm. What is the surface area?
(A) 72π cm²
(B) 144π cm²
(C) 216π cm²
(D) 288π cm²
Solution:
The surface area of a sphere is given by:
Surface Area=4πr²
Substitute the radius:
Surface Area= 4π×6²
Surface Area= 4π×36= 144π cm²
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