Answer :

SchwarzschildRadius
So,

The formula for the circumference of a circle:
[tex]C = 2 \pi r\ or\ C = \pi D (diameter)[/tex]

We can now substitute the given values and solve for D.
[tex]12 \pi = \pi D[/tex]

Divide both sides by pi.
[tex]12 = D[/tex]

The diameter of the circle is 12 units.
well, since the equation for circumference is [tex]2 \pi r^{2} [/tex]  and the diameter is double the radius, the diameter will end up being about 3.82

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