SOLUTION: Find the diameter of a sphere that has a surface area of 324pi in2

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Question 736840: Find the diameter of a sphere that has a surface area of 324pi in2
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
The surface area of a sphere = 4%2Api%2Ar%5E2


324%2Api+=+4%2Api%2Ar%5E2


324+=+4%2Ar%5E2


81+=+r%2A2


9=r.


The diameter is twice the radius = 2*9 = 18 inches.

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