Given:
The scale on a map reads 3 inches =25 miles.
Two cities are 7.5 inches apart on the map.
Then the distance is,
[tex]\begin{gathered} 3\text{ inches=25 miles} \\ 1\text{ inch=}\frac{25}{3}miles \\ 7.5\text{ inches=7.5}\cdot\frac{25}{3}=62.5\text{ miles} \end{gathered}[/tex]Answer: The distance between the two cities is 62.5 miles.