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A copper ball of mass 100 gm is at a tem...

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

`825^@ C`

B

`800^@ C`

C

`885^@ C`

D

`1250^@ C`

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