Answer
$2\pi r^3$
Work Step by Step
We know that $V=\pi r^2 h$ and that $h=2r$ because the height is twice the radius.
Therefore $V=\pi r^2 h=\pi r^2 (2r)=2\pi r^3$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - 5.1 Composite Functions - 5.1 Assess Your Understanding - Page 256: 65
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