ENGINEERING ECONOMY
FIFTEENTH EDITION

Solutions Manual

WILLIAM G. SULLIVAN Virginia Polytechnic Institute and State University

ELIN M. WICKS Wicks and Associates, L.L.P.

C. PATRICK KOELLING Virginia Polytechnic Institute and State University

© 2012 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This publication is protected by Copyright and written permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to: Rights and Permissions Department, Pearson Education, Inc., Upper Saddle River, NJ 07458.

Solutions to Chapter 1 Problems
A Note To Instructors: Because of volatile energy prices in today's world, the instructor is encouraged to vary energy prices in affected problems (e.g. the price of a gallon of gasoline) plus and minus 50 percent and ask students to determine whether this range of prices changes the recommendation in the problem. This should make for stimulating inclass discussion of the results.

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Because each pound of CO2 has a penalty of $0.20, Savings = (15 gallons  $0.10/gallon)  (8 lb)($0.20/lb) = $1.34 If Stan can drive his car for less than $1.34/8 = $0.1675 per mile, he should make the trip. The cost of gasoline only for the trip is (8 miles  25 miles/gallon)($3.00/gallon) = $0.96, but other costs of driving, such as insurance, maintenance, and depreciation, may also influence Stan’s decision. What is the cost of an accident, should Stan have one during his weekly trip to purchase less expensive gasoline? If Stan makes the trip weekly for a year, should this influence his decision?

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© 2012 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This publication is protected by Copyright