Elementary Technical Mathematics

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

Chapter 1 - Section 1.7 - Addition and Subtraction of Fractions - Exercise: 49

Answer

a) 6$\frac{1}{4}$ b)1$\frac{1}{2}$

Work Step by Step

two pieces of half inch pipe are 2$\frac{3}{8}$ and 3$\frac{7}{8}$ a) We have to find the total length of the two pieces 2$\frac{3}{8}$ + 3$\frac{7}{8}$ = $\frac{19}{8}$ + $\frac{31}{8}$ = $\frac{50}{8}$ = $\frac{25}{4}$ = 6$\frac{1}{4}$ b) She needs a total length of 4$\frac{3}{4}$ therefore cu off value will be 6$\frac{1}{4}$ - 4$\frac{3}{4}$ = $\frac{25}{4}$ - $\frac{19}{4}$ = $\frac{6}{4}$ = $\frac{3}{2}$ =1$\frac{1}{2}$
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