A runner completes a $5$-mile race in $10$ minutes. What was her average speed?

• A. $0.5$ miles per minute
• B. $5$ miles per minute
• C. $0.5$ mile per minute
• D. $0.1$ mile per minute

Answer: (A)

Verified step by step guidance

1. Identify the quantities given in the problem: the total distance covered by the runner is 5 miles, and the total time taken is 10 minutes.
2. Recall the formula for average speed, which is the total distance divided by the total time: \(\\text{Average speed} = \frac{\\text{Distance}}{\\text{Time}}\).
3. Substitute the given values into the formula: \(\\text{Average speed} = \frac{5 \\text{ miles}}{10 \\text{ minutes}}\).
4. Simplify the fraction to express the average speed in miles per minute.
5. Interpret the result to understand the runner's average speed and select the correct unit and value from the given options.