Salvage value is 10% per unit cost. Installation cost is P 10,000 for each unit. If the cost of

power in the area is P 8.8 per kW-hr and assuming the pumps work alternately in 24 hours,

how many hours per year would the motor have to be operated at full load for them to be

equally economical? If the expected number of hours of operation per year exceeds the break-

even point, which motor is economical? Money is worth 15%.