The circumference of a 13 inch round circle is: about 40.84 inches.
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13 pi or ~40in
Circumference = (pi) x (diameter) = 13 pi = 40.841 feet(rounded)
81.7 cm
You can get the circumference of a circle using either the equation radius times 2 times Pi or diameter times Piand im guessing by wide you mean diameter.So 13 x 3.14 (Pi)3.14x 13------9423140-------4082then add the decimal40.82so 40.82 ft is your answer
Radius: 81.64/2pi = 13 meters rounded up