For a motive power installation, two options of electric motors with 200CV are being considered
using a bank loan at an interest rate of 7% per year: motor A that consumes 160 kW of power
electric and costs 4800€ or; motor B which consumes 155 kW and costs €5800. Engines run for 1600 hours
per year with electricity costing €0.09/kWh. For a useful life of 15 years, coinciding with the duration of the
loan, calculate the savings that can be achieved with the most economical option versus the least economical.
Correct answer is 5558 euro
