The circumference of a circle is calculated using the formula C = 2πr, where r is the radius of the circle. In this case, the radius is half of the diameter, so it would be 15 feet. Plugging this into the formula, we get C = 2π(15) = 30π feet. This is approximately 94.25 feet around a 30-foot circle.
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Area of a circle = pi*radius squared
There are: 225*pi sq feet
circumference = 30*pi feet
The circumference of a 30-foot diameter circle is: 94.248 feet.
Circumference = 30*pi = 94.248 feet rounded to 3 d.p.