The city council wants the municipal engineer to evaluate three alternatives for supplementing the city water supply. The first alternative is to continue deepwell pumping at an annual cost of $10,500. The second alternative is to install an 18-inch pipeline from a surface reservoir. First cost is $25,000 and annual pumping cost is $7000. The third alternative is to install a 24-inch pipeline from the reservoir at a first cost of $34,000 and annual pumping cost of $5000. The life of each alternative is 20 years. For the second and third alternatives, salvage value is 10% of first cost. With interest at 8%, which alternative should the engineer recommend? Use present worth analysis.
The city council wants the municipal engineer to evaluate three alternatives for supplementing the city water supply. The first alternative is to continue deepwell pumping at an annual cost of $10,500. The second alternative is to install an 18-inch pipeline from a surface reservoir. First cost is $25,000 and annual pumping cost is $7000. The third alternative is to install a 24-inch pipeline from the reservoir at a first cost of $34,000 and annual pumping cost of $5000. The life of each alternative is 20 years. For the second and third alternatives, salvage value is 10% of first cost. With interest at 8%, which alternative should the engineer recommend? Use present worth analysis.
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