Which answer would score higher? Not sure where to start? Explain this Answer A Input power is 1200 W, so efficiency = 1200 ÷ 300 × 100 = 400%; the dissipated power is 1200 − 300 = 900 W. Answer B Input power is 1200 W, so efficiency = 300 ÷ 1200 × 100 = 25%; the dissipated power is 1200 − 300 = 900 W.