Question

How do you do this? I’m not sure how to even begin

Answer 1

$\bf \textit{arc's length}\\\\ s=r\theta ~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad radians\\ ------\\ r=24\\ \theta =\frac{5\pi }{6} \end{cases}\implies s=24\cdot \cfrac{5\pi }{6}\implies s=20\pi$