Question

During a washing cycle, a washing machine uses 713W usefully. The machine also radiates 133W of sound, and 548W more is wasted as heat. Calculate the efficiency of the washing machine. Give your answer as a percentage and round it to 2 decimal places.

Answer 1

Step-by-step explanation:

eff = watts usefully / ( total watts used )

= 713 / (713+133+548) = .5115 51.15 % EFFICIENCY