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200 g of water at 80 °C is mixed with 300 g of water at 20 °C. What is the final temperature?
A48 °C
B40 °C
C44 °C
D50 °C
Answer & Solution
Correct answer: C. 44 °C
Equating heat lost and gained gives T = (200 × 80 + 300 × 20)/500 = 44 °C.
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