The efficiency of the heat engine is η = Th - Tc/Th x 100. The correct option is A.
What is Efficiency?
The efficiency is defined as the work done by the engine divided by the heat supplied.
Work done is the difference between the heat supplied and heat rejected.
So, efficiency η = 1 - T₁/T₂
Where T₁ is the lower temperature and T₂ is the higher temperature.
So, the efficiency of the heat engine is
η = Th - Tc/Th x 100
Thus, the correct option is A.
Learn more about efficiency.
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