Answer
$8.83~cm$
Work Step by Step
Using the relation $s=r\theta$, we have $r=\frac{s}{\theta}$; that is
$$
r=\frac{s}{\theta}= \frac{18.5}{2\pi/3}=8.83~cm
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.6 - Radian Measure - Exercise - Page 418: 23
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