SOLUTION: a square fence with area 100ft^2 is reshaped into circular fence. What is the area of the new circular fence?

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Question 872153: a square fence with area 100ft^2 is reshaped into circular fence. What is the area of the new circular fence?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
100=10^2, so side length of the square is 10 feet. Perimeter is 4*10=40 feet.

Circumference of this perimeter turned into a circle is 2%2Api%2Ar=40;
r=20%2Fpi.

This circle's area is pi%2Ar%5E2=pi%2A%2820%2Fpi%29%5E2=highlight%28400%2Fpi=127.3%29.