Hot water cools from 
to 
in the first 10 minutes and to 
in the next 10 minutes. The temperature of the surrounding is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
According to Newton's law of cooling
In the first case, 
…. (i)
In the second case, 
…. (ii)
Dividing (i) by (ii), we get 
or 
⇒ ⇒ 
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