Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 10 - Section 10.1 - The Rectangular Coordinate System - Exercises - Page 457: 41


a) $90\pi$ b) $90\pi$

Work Step by Step

a) The radius is 5, and the height is 9, so we obtain: $A = 2\pi rh = 2\pi (5)(9) = 90\pi$ b) The radius is 9, and the height is 5, so we obtain: $A = 2\pi rh = 2\pi (9)(5) = 90\pi$
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