pi x 15 x 15 = 225 x 22/7 = 707 & 1/7 sq ft.
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circumference = 30*pi feet
Its diameter in feet is: 30/pi
The area of a circle when the diameter is 30 inches is: 706.9 square inches.
The circumference of a 30-foot diameter circle is: 94.248 feet.
The area of a circle is pi × r2. pi = 3.141592653589793 5 feet = 60 inches. The radius is half the diameter so the radius is 30 inches. If you plug 30 inches into the formula you get the answer of 2827.4333882308138 inches for the area of the circle.