abhishek (anonymous) doubts approved

Liquid is filled in a vessel which is kept in a room with temperature 20 C When the temperature of the liquid is 80 C then it looses heat at the rate of 60 cal/s. What will be the rate of loss of heat when the temperature of the liquid is 40 C

1. 180 cal/s
2. 40 cal/s
3. 30 cal/s
4. 20 cal/s