Answer:
1 : 500,000
Step-by-step explanation:
The scale of a map scale refers to the relationship (or ratio) between the distance on a map and the corresponding distance on the ground.
In the given map:
1 mm(map) = 500 m (actual)
1 meter = 1000 millimeter
Therefore:
500 meters = 1000 X 500 =500,000 millimeter
Therefore, the scale ratio of the map is:
1:500,000
