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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

Certain quantity of water cools from 70℃ to 60℃ in the first 5 minutes and to 54℃ in the next 5 minutes. The temperature of the surroundings is

Answer: (A)

Solution

Newton's law with mean temperatures: and , so

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Question ID VK-063564