An engine is supposed to operate between two reservoirs at temperat...

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An engine is supposed to operate between two reservoirs at temperature \( 727^{\circ} \mathrm{C} \) and \( 227^{\circ} \mathrm{C} \). The maximum possible efficiency of such an engine is [UPSEAT 2005; MP PET 2006;
\( \mathrm{P} \)
Similar DCE 1999; BHU 2004; RPMT 2006; KCET 2006]
W
(a) \( 1 / 2 \)
(b) \( 1 / 4 \)
(c) \( 3 / 4 \)
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