Basics Of Engineering Economy
2nd Edition
ISBN: 9780073376356
Author: Leland Blank, Anthony Tarquin
Publisher: MCGRAW-HILL HIGHER EDUCATION
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A rural, agriculture-based city that has 17,000 households is required to install treatment systems for the removal of arsenic and other harmful chemicals from its drinking water. The annual cost is projected to be $150 per household per year. Assume that one life will be saved every 3 years as a result of the removal systems. (a) What is the B/C ratio, if a human life is valued at $4.8 million? Use an interest rate of 8% per year and assume the life is saved at the end of each 3-year period. (b) What justifies the project?
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The B/C ratio will be
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The estimated annual cash flows for a proposed municipal government project are costs of $750,000 per year, benefits of $900,000 per year, and disbenefits of $225,000 per year. Calculate the conventional B/C ratio at an interest rate of 6% per year and determine if it is economically justified
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Basics Of Engineering Economy
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- A consultant, after 3 months of work, reported that the modified B/C ratio for a city-owned hospital heliport project is 1.6. If the initial cost is $1.8 million and the annual benefits are $125,000, what is the amount of the annual M&O costs used in the calculation? The report stated that a discount rate of 7% per year and an estimated life of 35 years were used. The M&O cost is $ .arrow_forwardThe B/C ratio for a mosquito control program proposed by the Harris County Department of Health is reported to be 2.1. The person who prepared the report stated that the annual health benefits were estimated to be $400,000, and that disbenefits of $25,000 per year were used in the calculation. He also stated that the costs for chemicals, machinery, maintenance, and labor were estimated at $150,000 per year, but he forgot to list the cost for initiating the program (trucks, pumps, tanks, etc.). If the initial cost was amortized over a 10-year period at 8% per year, what is the estimated initial cost?arrow_forwardThe following estimates (in $1000 units) have been developed for a security system upgrade at Chicago’s O’Hare Airport. (a) Calculate the conventional B/C ratio at a discount rate of 10% per year. Is the project justified? (b) Determine the minimum first cost that is possible to render the project just economically unjustified. Item Cash Flow First cost, $ 13,000 AW of benefits, $ per year 3,800 FW of disbenefits, year 20, $ 6,750 M&O costs, $ per year 400 Life, years 20arrow_forward
- The conventional B/C ratio estimate of 2.1 was reported to the County Commissioners for a proposed mosquito control program.The person who prepared the report stated that the health benefits were estimated to be $400,000 per year, and that disbenefits of $25,000 per year were used in the calculation. She also stated that the costs for chemicals, machinery, maintenance, and labor were estimated at $150,000 per year. However, sheforgot to list the cost for initiating the program (trucks, pumps, tanks, etc.). If the project has a 10-year study period and an 8%-per-year discount rate, determine the estimated initial cost.arrow_forwardAn Army Corps of Engineers project for improving navigation on the Ohio River will have an initial cost of $6,500,000 and annual maintenance of $130,000. Benefits for barges and paddle wheel touring boats are estimated at $820,000 per year. If the project is assumed to be permanent, use theconventional B/C ratio to determine if it is economically justified at 8% per year.arrow_forwardAn alternative has the following cash flows: benefits = $50,000 per year; disbenefits $27,000 per year; costs $25,000 per year. The B/C ratio is closest to: 1.04 L 0.92 2.00 0.96arrow_forward
- Two alternatives, identified as X and Y, are evaluated using the B/C method. Alternative Y has a higher total cost than X. If the B/C ratios are 1.2 and 1.0 for alternatives X and Y, respectively, which alternative should be selected? Whyarrow_forwardThe modified B/C ratio for a city-owned hospital heliport project is 1.7. The initial cost is $0.975 million, annual benefits are $150,000, and the estimated life is 29 years. What is the amount of the annual M&O costs used in the calculation at a discount rate of 6% per year? The annual M&O costs is $arrow_forwardFrom the following data, use the conventional B/C ratio for a project that has a 20-year life to determine if it is economically justified. Use an interest rate of 8% per year. To the People Annual benefits $115,000 per year Annual disbenefits $10,000 per year = Consequences To the Government First cost = $600,000 Annual cost $33,000 per year Annual savings $30,000 per year The B/C ratio is The project is justifiedarrow_forward
- An Army Corps of Engineers project for improving navigation on the Ohio River will have an initial cost of $6,450,000 and annual maintenance of $135,000. Benefits for barges and paddle wheel touring boats are estimated at $775,000 per year. The project is assumed to be permanent, and the discount rate is 10% per year. Determine if the Corps should proceed with the project. The B/C ratio is The project is economically not justifiedarrow_forwardAn alternative has the following cash flows: benefits = $50,000 per year; disbenefits = $27,000 per year; costs = $25,000 per year. The B/C ratio is closest to: (a) 0.92 (b) 0.96 (c) 1.04 (d) 2.00arrow_forwardOne of two alternatives will be selected to reduce flood damage in a rural community in central Arizona. The estimates associated with each alternative are available. Use B/C analysis at a discount rate of 8% per year over a 20-year study period to determine which alternative should be selected. For analysis purposes only, assume that the benefits of reduced flood damage are available in years 2, 12, and 18 of the study period. Retention Pond Channel Initial Cost, $ 880,000 3,000,000 Annual Maintenance , $/Year 92,000 30,000 Reduced Flood Damage, $ 200,000 675,000 The AB/C ratio is The alternative that should be selected is the (Click to select) varrow_forward
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