the answer is... 6.28
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Radius = Circumference/(2*pi) = 10.98 cm
we know circumference=2*pi*r; where r=1; circumeference=2*3.14*1=6.28 cm
radius = 35/(2*pi) in cm
The circumference = 18.8 cm
C=2 pi r C = 2 * 3.14 * 3.5 cm C= 21.98 cm