A body cools from 90°C to 80°C in 5 minutes. Under the same external conditions to cool from 80°C to 70°C the body will take
- A. 5 minutes
- B. 4 minutes
- C. 2.5 minutes
- D. More than 5 minutes
Answer: D. More than 5 minutes
Explanation: According to Newton's Law of Cooling, rate of cooling is proportional to temp difference. As temp drops, rate decreases, so time taken increases.