25.1327 is the answer.
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circumference of a circle = 2*pi*radius or diameter*pi
The circumference of a circle with a diameter of 7m is 21.98 m
The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
The circumference of a circle with a diameter of 3 meters is: 9.42 meters (diameter x Pi = circumference).
Circumference of circle: 1 times pi in m