Engine's efficiency is the ratio of the work done by the engine and heat absorbed by it. The efficiency of the given engine is 20%.
Engine efficiency:
[tex]E = \dfrac {W}{q}\times 100[/tex]
Where,
[tex]E[/tex]- efficiency
[tex]W[/tex] = work done by engine = 20J
[tex]q[/tex] - energy absorbed by engine = 100 J
Put the values in the formula,
[tex]E = \dfrac {20}{100}\times 100\\\\E = 20\%[/tex]
Therefore, the efficiency of the given engine is 20%.
To know more about the efficiency of engine:
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