A body cool from 
to 
in 
. Calculate the time it takes to cool from 
to 
. The temperature of the surrounding is 
.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Given, temperature of surrounding, 
.
We know by Newton's law of looking
According to first case,
By using Eq. (i), we get
According to second case, again by using Eq. (i), we get
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