Question

Karen has a map with a scale of 1 inch = 20 miles.The distance she needs to travel measures 3/4 inches on the map.What is the actual distance karen will travel?​

Answer 1

15 miles

Explanation:

You want to know the distance represented by 3/4 inch on a map with a scale of 1 inch = 20 miles.

Proportion

The idea of the map scale is that it tells you the proportion between map distance and ground distance:

map : actual = 1 in : 20 miles

We can maintain this relationship if we multiply each of its parts by 3/4:

(3/4)(1 in) : (3/4)(20 miles)

3/4 in : 15 miles . . . . . . . . . . . simplify

The actual distance Karen will travel is 15 miles.