Elementary Technical Mathematics

by Nelson, Robert; Eren, Dale;

Published by Brooks Cole

ISBN 10: 1285199197

ISBN 13: 978-1-28519-919-1

Chapter 12 - Test - Page 446: 6

Answer

$400 \pi \ cm^2\approx 1260~cm^2$

Work Step by Step

The area of a circle is given by $$ Area= \pi r^2= 20^2\pi=400 \pi \ cm^2\approx 1260~cm^2 .$$

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