A) \[{{38.5}^{o}}C\]
B) \[{{40}^{o}}C\]
C) \[{{42.85}^{o}}C\]
D) \[{{45}^{o}}C\]
Correct Answer: C
Solution :
According to Newton's law of cooling rate of cooling \[\propto (T-{{T}_{0}})\], where T is the average temperature 1in the given time interval. Hence \[\frac{(60-50)}{10}\propto \left( \frac{60+50}{2}-25 \right)\] and \[\left( \frac{50-T}{10} \right)\propto \left( \frac{50+T}{2}-25 \right)\] Solving we get, \[T={{42.85}^{o}}C\]You need to login to perform this action.
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