Energy used by a motor?

Question

An electric motor draws 1/2 horsepower while it is operating. The motor is used continuously for 12 hours a day to run an evaporative cooler. Assume that electrical energy costs 11 cents per kilowatt.hour.

Answer 1

Energy used by a motor?
E=Pt= 0.5 (745.7) 12=4.474 kw.hour

Cost = E rate= 4.474 x 0.11= $0.49