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A Carnot engine operating between temperatures T1 and T2, has efficiency 1/6. When T2, is lowered by 62 K, its efficiency increases to 1/3. Then, T1 and T2, are respectively

(a) 372 K and 330 K 

(b) 330 K and 268 K

(c) 310 K and 248 K 

(d) 372 K and 310 K

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Correct Option (d) 372 K and 310 K

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