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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 . Then

A Carnot engine operating between temperatures T1 and T2 has efficiency 1/6.
When T2 is lowered by 62 K, its efficiency increases to ⅓. Then T1 and T2 are,
respectively
(a) 372 K and 310 K
(b) 372 K and 330 K
(c) 330 K and 268 K
(d) 310 K and 248 K

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