Elementary Technical Mathematics

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

Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 57


1250 ft

Work Step by Step

Create a proportion using ratios of length : resistance. $\frac{750\ ft}{1.563\ \Omega}=\frac{x\ ft}{2.605\ \Omega}$ Set the product of the means equal to the product of the extremes and solve for the variable. $1.563\times x = 750\times2.605$ $1.563x=1953.75$ $1.563x\div1.563=1953.75\div1.563$ $x=1250$
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