SOLUTION: What is the area of a circle with a diameter that is 20 inches long? Round your answer to the nearest tenth.

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Question 252560: What is the area of a circle with a diameter that is 20 inches long? Round your answer to the nearest tenth.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
The formula for the area of a circle is:
A+=+pi%2Ar%5E2
The diameter = 20 in. WE want radius, which is 1/2 diameter or 10 in. So,
A+=+pi%2A10%5E2
A+=+100pi
A ~ 314.2 in^2