Evaluate
\frac{5\pi r}{3}
Differentiate w.r.t. r
\frac{5 \pi}{3} = 5.235987755982989
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2\pi r\times \frac{5}{6}
Divide r\times 300 by 360 to get r\times \frac{5}{6}.
\frac{2\times 5}{6}\pi r
Express 2\times \frac{5}{6} as a single fraction.
\frac{10}{6}\pi r
Multiply 2 and 5 to get 10.
\frac{5}{3}\pi r
Reduce the fraction \frac{10}{6} to lowest terms by extracting and canceling out 2.
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