Solved: A large water utility is planning to upgrade
Chapter 3, Problem 3.58(choose chapter or problem)
A large water utility is planning to upgrade itsSCADA system for controlling well pumps,booster pumps, and disinfection equipment sothat everything can be centrally controlled. PhaseI will reduce labor and travel costs by $28,000per year. Phase II will reduce costs by an additional$20,000 per year, that is, $48,000. Phase Isavings should occur in years 0, 1, 2, and 3 andphase II savings should occur in years 4 through10. Let i = 8% per year.(a) Determine the present worth of the upgradedsystem for years 1 to 10.(b) The utility General Manager had hoped for apresent worth of at least $400,000. Determinethe interest rate at which this would becorrect.
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