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