300 calories of heat is given to a heat engine, and it rejects 225 calories of heat. If source temperature is $227 ^ { \circ } \mathrm { C }$, then the temperature of sink will be $\_\_\_\_$ ${ } ^ { \circ } \mathrm { C }$.
300 calories of heat is given to a heat engine, and it rejects 225 calories of heat. If source temperature is $227 ^ { \circ } \mathrm { C }$, then the temperature of sink will be $\_\_\_\_$ ${ } ^ { \circ } \mathrm { C }$.