The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20^@C, the temperature of the surroundings to which it rejects heat is.

The coefficient of performance of a refrigerator is 5. If the temperat

1.	The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20^@C, the temperature of the surroundings to which it rejects heat is.
Answer» `21^(@)C` `31^(@)C` `41^(@)C` `11^(@)C` Solution :`"Coefficient of performance, K"=(T_(2))/(T_(1)-T_(2))` `T_(1)=((K+1)/(K))T_(2)=(6)/(5)xx253=303.6K` `T_(1)=20.6^(@)C`