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What is the radius of a sphere when the surface area is 803.84 in2?Use 3.14 for π.

A8 in.
B16 in.
C2 in.
D4 in.

What is the diameter of a sphere with surface area of 1256 in2?Use 3.14 for π.

A10 in.
B12.56 in.
C20 in.
D5 in.

Verified Answer :

jsmitty

well, to find the surface area of a circle it is 2 pi r. The question gives you the surface area so you divide that by 2 pi. That will give you the radius. For the second one you set it up the same but it'll give you the radius. The diameter is 2 times the radius so when you get the radius multiply the answer by 2 and that will give you the diameter.

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