Answer:
1km
Explanation:
To awnser this lets first define scale
Scale is basically when 2 things are poportional, say for instance you are baking a cake and it requires 2 eggs for every 1 cake you make. If you make 2 cakes you need 4 eggs, 2 for each cake.
Similarly a map is small, where the area it represents is huge. I can't draw the entirety of New York City but I can scale it down, but how do we make this map accurate?
We use scale, scale basically means you take a distance and you draw it as a smaller distance on the map. This scale is 1cm to 1km. Meaning for every 1km distance in real life there is a 1cm difference on the map.
So if the distance on the map was 1cm, the distance in real life would be 1km