A copper ball of mass 100 g is at a temp...

A copper ball 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`)

`800^(@)C`

`885^(@)C`

`1250^(@)C`

`825^(@)C`

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