Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 6 - Applications of the Integral - 6.3 Volumes of Revolution - Preliminary Questions - Page 304: 4


(b) is the right answer.

Work Step by Step

(b) is the right answer. The cross sections will be washers with outer raduis $f(x)$ and inner radius $g(x)$ and the area will be $\pi(f(x)^2-g(x)^2)$.
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