the radius is half of the diameter, so 1.4/2 = 0.7 cm
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Assuming that "it" refers to diameter, the radius is 7 cm and the circumference is 44.0 cm.
C=2 pi R
Circumference = 2*pi*radius or pi*diameter Circumference = 87.9645943 or 88 cm to the nearest cm
Radius = Diameter/2 Diameter = 2* Radius
The radius is: 6.267 cm