(Last Updated On: January 21, 2020)

#### Problem Statement: EE Board April 1997

The cost fuel in running a locomotive is proportional to the square of the speed and is $25 per hour for a speed of 25 miles per hour. Other costs amount to $100 per hour, regardless of the speed. What is the speed which will make the cost per mile a minimum?

- A. 40 mph
- B. 55 mph
- C. 50 mph
- D. 45 mph

#### Problem Answer:

The speed which will make the cost per mile a minimum is **50 mph **

#### Latest Problem Solving in Differential Calculus (MAXIMA-MINIMA & TIME RATES)

More Questions in: Differential Calculus (MAXIMA-MINIMA & TIME RATES)

#### Online Questions and Answers in Differential Calculus (MAXIMA-MINIMA & TIME RATES)

Show Simple Act of Caring!