A copper ball of mass 100gm is at a temperature T. It is dropped in a copper calorimeter of mass 100gm, filled with 170gm of water at room temperature. Subsequently, the temperature of the system is found to be 75°CT is equal to
(Given : Room temperature =30°C, specific heat of copper =0.1 cal/gm°C)

A 825°C
B 800°C
C 885°C
D 1250°C