Question
A state highway department is trying to decide whether it should hot-patch a short sectionof an existing country road or resurface it. If the hot-patch
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A state highway department is trying to decide whether it should hot-patch a short sectionof an existing country road or resurface it. If the hot-patch method is used, approximately 300 cubic meters of material would be required at a cost of $700 per cubic meter (in place). Additionally, the shoulders will have to be improved at the same time at a cost of $24,000. These improvements will last 2 years, at which time they will have to be redone. The annual cost of routine maintenance on the patched up road would be $5000. Alternatively, the state can resurface the road at a cost of $850,000. The surface will last 10 years if the road is maintained at a cost of $2000 per year beginning 4 years from now. No matter which alternative is selected, the road will be completely rebuilt in 10 years. At an interest rate of 9% per year,
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make a recommendation on the best alternative based on the annual worth analysis.
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make a recommendation based on the present worth method.
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