An alloy consists `40%` copper and `60%` nickel. A piece of the alloy of mass `0.1kg` is palced in a calorimeter of water equivalent is `10xx10^(-3)kg` which contains `90xx10^(-3)` kg of water at `10^(@)C`. If the final temperature is `20^(@)C`, calculate the original temperature of the alloy. (Specific heat capacity of copper `=339J kg^(-1)K^(-1)` and that of nickel`=462J kg^(-1)K^(-1)`)

Answer

`116.2^(@)C`