A copper all of mass 100 g is at a tempe...

A copper all of mass 100 g is at a temperature T. It is dropped in a copper calorimeter of mass 100 g, filled with 170 g 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)/g^@C`)

`1250^@C`

`825^@C`

`800^@C`

`885^@C`

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