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5Kg of ice at -30C is added to 30 Kg at 80C. What is the temperature...

5Kg of ice at -30C is added to 30 Kg at 80C. What is the temperature of the mixture ? (specific heat of ice is 2100 J/KgC, specific heat of water is 4186 J/KgC and Latent heat of fusion is 33.5 x 10^4 J/Kg)?
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