railway RRB Technician Grade 1 Mock Test 2024 Basic Science and Engineering Heat and Temperature

A 800 gram of cold water at 30°C is mixed with 400 gram of hot water at 90°C. By assuming that no heat escapes from the mixture, find out the final temperature of the mixture?

1
120°C
2
60°C
3
50°C
4
None of the above
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