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SINGLE CHOICE:17. 5kg of water at 80째C is taken in a bucket of negligible heat capacity, 15kg of water at 20째C isadded to it. What is the temperature of the mixture?1) 45 C2) 65 째C3) 85 C4) 35 째C

Answer»

Energy Lost by the hot water=Energy Gain by the cold waterLet temperature of mixture be tThen, 5(80-t) = 15(t - 20)400-5t = 15t - 30020t = 700t = 35



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