Answer
$V=\pi(r^{2}h).$
Work Step by Step
If $V$ varies jointly with $r^{2}$ and $h , $
there exists a nonzero number $k$ such that
$V=k(r^{2}h).$
Given $k=\pi,$ we write
$V=\pi(r^{2}h).$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 2 - Section 2.5 - Variation - 2.5 Assess Your Understanding - Page 193: 37
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