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Question

A Carnot engine efficiency is equal to 17. If the temperature of the sink is reduced by 65 K, the efficiency becomes 14. Then temperature of source and the sink in the first case are respectively :

A
610 K and 520 K
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B
520 K and 606 67 K
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C
606.67 K and 520 K
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D
520 K and 610 K
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