A metal rod cools at the rate of 
when its temperature is 
and the rate of 
when its temperature is 
. The temperature of the surrounding is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the surrounding temperature is 
.
By Newton's law of cooling, 
… .(i)
… .(ii)
Divide equation (i) by equation (ii)
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