204.2
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The circumference of a circle of 65cm radius is about 408.41cm(Circumference = 2*pi*65 cm)
65/2.54=25.59055118110236"
Diameter of a circle = circumference/pi
The diameter of a circle with the circumference of 3.25 is: 1.034
If the circumference of a circle is 17.27, the diameter is: 5.5