Suppose that a cup of soup cooled from 90C to 60C after 15minutes in a room whose temperatures was 20C. Use Newton's law ofcooling to answer the following questions.
a. How much longer would it take the soup to cool to 40C?
b. Instead of being left to stand in the room, the cup of 90Csoup is put in the freezer whose temperature is -15C. How long willit take the soup to cool from 90C to 40C?
