Neet
Heat And Thermodynamics
NEET 2021
MCQ+4 / -12021
A cup of coffee cools from 90\(^\circ\)C to 80\(^\circ\)C in t minutes, when the room temperature is 20\(^\circ\)C. The time taken by a similar cup of coffee to cool from 80\(^\circ\)C to 60\(^\circ\)C at a room temperature same at 20\(^\circ\)C is :