SOLUTION: A sphere has a diameter of 2,160 meters.How many meters long is "Unit X" if the surface of the sphere, measured in square Units X is equal to the volume of the sphere measured in c

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Question 662774: A sphere has a diameter of 2,160 meters.How many meters long is "Unit X" if the surface of the sphere, measured in square Units X is equal to the volume of the sphere measured in cube Units X? Round to the nearest whole number.
Answer by Alan3354(69443) About Me  (Show Source):
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A sphere has a diameter of 2,160 meters.How many meters long is "Unit X" if the surface of the sphere, measured in square Units X is equal to the volume of the sphere measured in cube Units X? Round to the nearest whole number.
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4pi%2Ar%5E2+=+4pi%2Ar%5E3%2F3
r%5E2+=+r%5E3%2F3
r = 3
SA = 36pi sq units
Vol = 36pi cubic units
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I don't see how the 2160 is a factor.