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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A body in laboratory takes 4 minutes to cool from 61°C to 59°C. If the laboratory temperature is 30°C, then the time taken by it to cool from 51°C to 49°C will be

Answer: (C)

Solution

gives ; then gives

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Question ID VK-063429