The engine efficiency is 64.73 %
Step-by-step explanation:
Given data
To find the engine’s efficiency we have the formula,
Energy input- 4565 KJ
Energy output - 2955KJ
Efficiency= energy output/ energy input ×100%
=2955/4565
=0.6473 ×100
η =64.73 %
The engine efficiency is 64.73 %