100 g of water at 80 °C is mixed with 200 g of water at 20 °C. Neglecting heat losses, the final temperature is
A. 60 °C
B. 30 °C
C. 50 °C
D. 40 °C
1 answer
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Answer: D. 40 °C
\(100(80-T)=200(T-20)\Rightarrow T=40\) °C.
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· 23 Oct 2026
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