A) less than 6 min
B) 6 min
C) more than 6 min
D) None of the above
Correct Answer: C
Solution :
According to Newton's law of cooling, Rate of cooling\[\propto \]Mean temperature difference \[\Rightarrow \] \[\frac{Fall\text{ }in\text{ }temperature}{Time}\propto \left[ \frac{{{\theta }_{1}}+{{\theta }_{2}}}{2}-{{\theta }_{0}} \right]\] \[\because \] \[\left[ \frac{{{\theta }_{1}}+{{\theta }_{2}}}{2} \right]>{{\left[ \frac{{{\theta }_{1}}+{{\theta }_{2}}}{2} \right]}_{2}}\] \[\Rightarrow \] \[{{T}_{1}}<{{T}_{2}}\]
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