In a map scale, 1 inch represents 5 miles. If two cities are...

Question Analysis
This question tests the student's ability to apply cross-multiplication to a real-world problem involving map scales. The given proportion is .

Key Concept Explanation
Cross-multiplication is a method to solve proportions by multiplying the numerator of one fraction by the denominator of the other, setting the products equal: , so .

Step-by-step Solution
1. Set up the proportion: