Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 12 - Test - Page 446: 7

Answer

$40.0 \pi \ cm\approx 126~cm$

Work Step by Step

The circumference of a circle is given by $$ circumference=2 \pi r = 2(20)\pi=40.0 \pi \ cm\approx 126~cm .$$
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