SOLUTION: Backpackers who build campfires are advised to clear a 10ft-radius circle around the fire. How many square feet should be cleared?

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Question 281317: Backpackers who build campfires are advised to clear a 10ft-radius circle around the fire. How many square feet should be cleared?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
a=pir^2
a=3.14*10^2
a=314 sq ft