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Thermal Properties of Matter: NEET 2021

Medium· Out of Syllabus· +4 / −1
A cup of coffee cools from 90∘C90^\circ\mathrm{C} to 80∘C80^\circ\mathrm{C} in tt minutes, when the room temperature is 20∘C20^\circ\mathrm{C}. The time taken by a similar cup of coffee to cool from 80∘C80^\circ\mathrm{C} to 60∘C60^\circ\mathrm{C} at a room temperature same at 20∘C20^\circ\mathrm{C} is :
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