The coefficient of performance of a refrigerator is 5 if the temper...

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The coefficient of performance of a refrigerator is 5 if the temperature inside freezer is \( -20^{\circ} \mathrm{C} \), is temperature of the
\( \mathrm{P} \) surroundings to which it rejects heat is
[AIPMT 2015]
(a) \( 41^{\circ} \mathrm{C} \)
(b) \( 11^{\circ} \mathrm{C} \)
W
(c) \( 21^{\circ} \mathrm{C} \)
(d) \( 31^{\circ} \mathrm{C} \)
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