Answer
$100\$$
Work Step by Step
$1 foot=1/3 \ yard$ and $1 inch=1/36 \ yard.$ Thus the volume of the pathway is: $(15\cdot1/3)(8\cdot1/3)(9\cdot1/36)=10/3$ cubic yard. Thus the cost is: $10/3\cdot30=100\$$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 10 - Geometry - 10.5 Volume and Surface Area - Exercise Set 10.5 - Page 658: 40
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