Answer
$8.4 \pi \ m$
Work Step by Step
Let $C$ be the circumference:
$C=2 \pi r$ or, $C=\pi d~~~~(1)$
Here, $r$ represents radius and $d$ is diameter.
We are given that $r=4.2 \ m$
Thus, equation (1) becomes:
$C=(2 \pi)(4.2)=8.4 \pi \ m$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 10 - Area - 10-6 Circles and Arcs - Practice and Problem-Solving Exercises - Page 654: 26
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