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A Carnot engine, whose temperature of the source is `400K` receives `200 calories` of heat at this temperature and rejects `150 calaroies` of heat to

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A Carnot engine, whose temperature of the source is `400K` receives `200 calories` of heat at this temperature and rejects `150 calaroies` of heat to the sink. What is the temperature of the sink? Also, calculate the efficiency of the engine
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Correct Answer - `300K, 25%`
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