Question

If the map scale is 1:30 000 and the distance on the map is 12mm what would be the real world distance in kilometers be

Answer 1

1:30 000 means that 1 cm on the map is 30 000 cm (or 300 m) in the real word. Thus, since 12 mm is 1.2 cm, the real-world distance is

$$d=1.2·300=360\text{ m}.$$