The cost of 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 $10 per hour, regardless of the speed. What is the speed which will make the cost per mile a minimum? 55 mph 40 mph 45 mph 50 mph
The cost of 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 $10 per hour, regardless of the speed. What is the speed which will make the cost per mile a minimum? 55 mph 40 mph 45 mph 50 mph
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The cost of 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 $10 per hour, regardless of the speed. What is the speed which will make the cost per mile a minimum?
55 mph
40 mph
45 mph
50 mph
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