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The relevant formula here is

C = 2 Pi r

where C denotes the circumference, Pi denotes 3.14... and r is the radius.

You want to know the radius. If you solve the equation for r, you get:

r = C / 2 Pi.

This means you have to divide C = 4.85 by 2 times Pi to get the result.

I calculated:

r = 4.85 / (2 * 3.14...) = 0.7719014...

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15y ago

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Q: If the circumference is 4.85 what is the radius?
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