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What is the surface area of a sphere with a diameter of 14 cm?

A. 98π cm²

B. 196π cm²

C. 28π cm²

D. 784π cm²

User Kramb
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1 Answer

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Final answer:

The surface area of a sphere with a diameter of 14 cm is 196π cm², calculated using the formula A = 4 π r² where r is the radius.

Step-by-step explanation:

To find the surface area of a sphere, we use the formula: A = 4 π r², where r is the radius of the sphere. Given that the diameter of the sphere is 14 cm, we first need to calculate the radius. The radius is half of the diameter, so r = 14 cm / 2 = 7 cm. Then we substitute this value into the formula: A = 4 π (7 cm)² = 4 π (49 cm²) = 196 π cm². Therefore, the surface area of the sphere is 196π cm², which corresponds to option B.

User Newbie Learner
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