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Circumference = 2*pi*r = 50.265 metres
The circumference is approximately 50.27m (C = 2*Pi*r)
Area: A = pi x r2 A = 3.14 x (8m)2 A = 200.96m2 Circumference: C = 2 x pi x r C = 2 x 3.14 x 8m C = 50.24m
If that's the radius, use the standard formula for the volume of a sphere.If that's the diameter, divide it by 2 to get the radius; then you can use the standard formula for the volume of a sphere.
the radius of a circle is r