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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A body cools at the rate of 1.5°C/min when its temperature is 30°C above that of the surrounding. At what temperature above the surrounding will it cool at the rate of 1°C/min?

Answer: (B)

Solution

The rate of cooling is proportional to the excess temperature, so

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Question ID VK-063115