A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 75∘C. T is given by (Given : room temperature = 30∘C, specific heat of copper = 0.1 cal/gm∘C)
a. 1250∘C
b. 825∘C
c. 800∘C
d. 885∘C