Answer :
To calculate efficiency you should divide output by input energy.
The engine produces 48000 j energy from 400000 j given energy from gasoline.
48 000/400 000 = 48/400 = 12/100 = 12%
Efficiency of this engine is 12%
The engine produces 48000 j energy from 400000 j given energy from gasoline.
48 000/400 000 = 48/400 = 12/100 = 12%
Efficiency of this engine is 12%
