Q1. In a container, the temperature of hot food falls from 90°C to 82^{circ}C in 1 minute. According to Newton's law of cooling, how much time will be taken when its temperature falls from 70^{circ}C to 66^{circ}C ?
- (a) 8 s.
- (b) 2 s.
- (c) 2 s.
- (d) 6 s.