(Last Updated On: January 22, 2020)

#### Problem Statement:

According to Newton’s law of cooling, the rate at which a substance cools in air is directly proportional to the difference between the temperatures of the substance and that of air. If the temperature of the air is 30° and the substance cools from 100° to 70° in 15 minutes, how long will it take to cool 100° to 50°?

- A. 33. 59 min
- B. 43.60 min
- C. 35.39 min
- D. 45.30 min

#### Problem Answer:

It will take **33. 59 min** to cool from 100° to 50°

#### Latest Problem Solving in Differential Equations

More Questions in: Differential Equations

#### Online Questions and Answers in Differential Equations

Show Simple Act of Caring!