sumalee cooks a pot of curry. At first, its temperature is 30ํ c. it is heated up at the rate of 10ํ c per minute for 8 minutes. sumalee cooks at the curry at the new temperature for 15 minutes. then she switches off the flame. the curry cools down at one-fifth the heating rate for a period of 20 minutes. find the temperature of the curry now.