Solve for r
r=\frac{1}{25\pi }\approx 0.012732395
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2\pi r=0.08
The equation is in standard form.
\frac{2\pi r}{2\pi }=\frac{0.08}{2\pi }
Divide both sides by 2\pi .
r=\frac{0.08}{2\pi }
Dividing by 2\pi undoes the multiplication by 2\pi .
r=\frac{1}{25\pi }
Divide 0.08 by 2\pi .
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