Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 1 - Section 1.8 - Multiplication and Division of Fractions - Exercise: 47


$3\frac{27}{32} \text{ inches}$

Work Step by Step

The inside diameter of the pipe can be found by subtracting twice the thickness of its wall to its outside diameter. Thus, Outside diameter $\\=4\frac{9}{32}-2\times \frac{7}{32} \\=4\frac{9}{32} - \frac{14}{32} \\=(3+1+\frac{9}{32})-\frac{14}{32} \\=3+\frac{32}{32}+\frac{9}{32}-\frac{14}{32} \\=3+\frac{41}{32}-\frac{14}{32} \\=3+\frac{41-14}{32} \\=3+\frac{27}{32} \\=3\frac{27}{32} \text{ inches}$
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