Answer
$$r=\frac{E}{I}.$$
Work Step by Step
To solve the given equation for $r$, we divide both sides by $I$ as follows
$$\frac{E}{I}=\frac{Ir}{I}\Longrightarrow r=\frac{E}{I}.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 6 - Section 6.7 - Formulas - Exercises - Page 255: 1
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