Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 9 - Review - Page 688: 39


$A=2000\pi$ square centimeters $A\approx 3.14\times 2000= 6280$ $V=20000\pi$ cubic centimeters. $V\approx 3.14\times 20000=62800$

Work Step by Step

This solid is a cylinder and its volume can be calculated as: $V=\pi r^2 h$ where r is the radius, and h is the height. Here: $V=\pi\times 20^2\times50=20000\pi$ cubic centimeters. $V\approx 3.14\times 20000=62800$ The surface of a cylinder can be calculated as: $A=2\pi rh$ Here: $A=2\pi \times20\times 50=2000\pi$ square centimeters $A\approx 3.14\times 2000= 6280$
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