A Carnot engine, whose efficiency is 40\%, takes in heat from a source maintained at a temperature of 500\,{K}. It is desired to have an engine of efficiency 60\%. Then, the intake temperature for the same exhaust (sink) temperature must be: [AIEEE 2012]

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Correct Answer is : 750 K750\,{K}750K

AIEEE 2012 Solved Paper