42/pi ie 13 feet 4½ inches, assuming pi to be 3.14
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diameter = circumference ÷ π = 10 ft ÷ π ≈ 3.18 ft
if a jogging track has a diameter of 300 ft. what is the circumference
The circumference of any circle is (pi) x (the circle's diameter).
The formula to calculate the circumference of a circle is C = πd, where C is the circumference, π is pi (approximately 3.14159), and d is the diameter of the circle. In this case, the diameter is 35 feet, so the circumference would be C = π(35) = 110.19 feet.
If the diameter is 25 feet then the circumference is 78.5 feet (approx).