Circumference of a circle = PI x D, so answer is 3.142 x 78 = 245.08 ft
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Radius = 12.414 inches (to 3 dp)
The circumference of a 3.5 inch circle is: 10.996 inches.
The radius of a circle with a 14.5 inch circumference is 2.15 inches
The circumference of a 27-inch circle is: 84.8 inches.
The circumference of a 21-inch circle is: 66 inches.(C = d x Pi).