A circle with a radius of 2.5 inches has a circumference of 15.71 inches.
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The circumference of a circle if radius is 25 is about 157.1
Circumference of a circle = 2*pi*radius Circumference = 2*pi*25 =157.0796327 inches or 157 inches correct to three significant figures.
The diameter of a circle with a circumference of 25 inches is: 78.54 inches. (d = c divided by Pi).
25*pi inches
It is: 25/pi which is about 8 inches