Using pi as 3.14, the diameter of the circle is approximately 39.490446
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Circumference = 124*pi inches
Circumference of circle: 124*pi = 389.557 feet to three decimal places
Diameter of a circle = circumference/pi
The diameter of a circle with the circumference of 3.25 is: 1.034
If the circumference of a circle is 17.27, the diameter is: 5.5