Question

On a map, 3 cm represents 12 km. What actual distance is represented by 8.5 cm?

Solution

1. The scale is 3 cm : 12 km.
2. Actual distance for 1 cm = 12/3 = 4 km.
3. Actual distance for 8.5 cm = 8.5 x 4 = 34 km.