1.6 mixing of hot water and cold water in calorimetry problems explained in Tamil

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Which one of the following would raise the temperature of 20 gm of water at 30°C most when mixed with : (A) 20 gm of water at 40°C B) 40 gm of water at 35°C (C) l0 gm of water at 50°C d) 4 gm of water at 80 C