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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A liquid cools from 70 ℃ to 60 ℃ in 5 minutes. If the temperature of the surrounding is constant at 30℃, then the time taken by the liquid to cool from 60 ℃ to 50 ℃ is [Assam CEE 2015]

Answer: (C)

Solution

gives ; then gives $t = 10 ×

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Question ID VK-063580