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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

An object of cooled from 75 ℃ to 65 ℃ in 2 minutes in a room at 30 ℃. The time taken to cool another object from 55℃ to 45℃ in the same room in minutes is

Answer: (A)

Solution

gives ; then gives $t =

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Question ID VK-063589