Engineering Economy
16th Edition
ISBN: 9780133582819
Author: Sullivan
Publisher: DGTL BNCOM
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Textbook Question
Chapter 11, Problem 20P
A bridge is to be constructed now as part of a new road. Engineers have determined that traffic density on the new road will justify a two-lane road and a bridge at the present time. Because of uncertainty regarding future use of the road, the time at which an extra two lanes will be required is currently being studied.
The two-lane bridge will cost $200,000 and the four- lane bridge, if built initially, will cost $350,000. The future cost of widening a two-lane bridge to four lanes will be an extra $200,000 plus $25,000 for every year that widening is delayed. The MARR used by the highway department is 12% per year. The following estimates have been made of the times at which the four-lane bridge will be required:
In view of these estimates, what would you recommend? What difficulty, if any, do you have in interpreting your results? List some advantages and disadvantages of this method of preparing estimates.
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A bridge is to be constructed now as part of a new road. Engineers have determined that traffic density on the new road will justify a two-lane road and a bridge at the
present time. Because of uncertainty regarding future use of the road, the time at which an extra two lanes will be required is currently being studied.
The two-lane bridge will cost $220,000 and the four-lane bridge, if built initially, will cost $440,000. The future cost of widening a two-lane bridge to four lanes will be an
extra $220,000 plus $23,000 for every year that widening is delayed. The MARR used by the highway department is 12% per year. The following estimates have been
made of the times at which the four-lane bridge will be required:
Pessimistic estimate
Most likely estimate
Optimistic estimate
In view of these estimates, what would you recommend? List some advantages and disadvantages of this method of preparing estimates.
4 years
6 years
7 years
A Click the icon to view the interest and annuity table…
A bridge is to be constructed now as part of a new road. Engineers have determined that traffic density on the new road will justify a two-lane road and a bridge at the present time. Because of uncerta.
regarding future use of the road, the time at which an extra two lanes will be required is currently being studied.
The two-lane bridge will cost $210,000 and the four-lane bridge, it built initially, will cost $400,000. The future cost of widering a two-lane bridge to four lanes will be an extra $210,000 plus $23,000 for
year that widening is delayed The MARR used by the highway department is 15% per year. The following estimates have been made of the times at which the four-lane bridge will be required:
4 years
Pessimistic estimate
Most likely estimate
5 years
9 years
Optimistic estimate
In view of these estimates, what would you recommend? List some advantages and disadvantages of this method of preparing estimates
Click the icon to view the interest and annuity table for discrete…
*12
Chapter 11 Solutions
Engineering Economy
Ch. 11 - Prob. 1PCh. 11 - Refer to Example 11-2. Assuming gasoline costs...Ch. 11 - Prob. 3PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Prob. 9PCh. 11 - Prob. 10P
Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - You have decided to purchase a new automobile with...Ch. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prob. 19PCh. 11 - A bridge is to be constructed now as part of a new...Ch. 11 - An aerodynamic three-wheeled automobile (the Dart)...Ch. 11 - Prob. 23PCh. 11 - Prob. 24SECh. 11 - Prob. 25SECh. 11 - Prob. 26SECh. 11 - Prob. 27SECh. 11 - Prob. 28SECh. 11 - Prob. 29SECh. 11 - Prob. 30FECh. 11 - Prob. 31FECh. 11 - A supermarket chain buys loaves of bread from its...Ch. 11 - A supermarket chain buys loaves of bread from its...Ch. 11 - Prob. 34FECh. 11 - Prob. 35FECh. 11 - Prob. 36FECh. 11 - Prob. 37FECh. 11 - Prob. 38FECh. 11 - Prob. 39FECh. 11 - Prob. 40FECh. 11 - Prob. 41FECh. 11 - Prob. 42FE
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