Question

If the great circle circumference of a sphere is 16pie yards, find its surface area

Answer 1

Explanation:

The circumference of a circle = 2*pi * r

so 16 pi yards = 2 * pi * r

Divide both sides by 2

16 pi/2 = 2*pi * r /2

8*pi = pi * r

Divide both sides by pi

8 * pi / pi = pi * r / pi

r = 8

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Surface Area = 4 pi * r^2

r = 8

Surface Area = 4 * pi * 64

Surface Area = 256 * pi