The equation that is used here is Circumference = 2 pi radius or C = 2 pi r
If the circumference is 16, solving for r in the equation yields: r = 16 / 2 pi
Answer is r = 8 / pi and since pi = 3.28 .... you can do the math from here.
Hope this helps.
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Circumference of the circle: 2*pi*8 = 16*pi m
The radius of a circle with a circumference of 110 is: 17.507
The circumference of a circle with a radius of 6.7 is: 42.097
Radius of a circle = circumference/2*pi
The circumference of circle with radius 12cm is 75.4cm