Answer:
1:125,000
Explanation:
1 km = 100,000 cm
4 km = 400,000 cm
Now we can calculate the scale:
Scale = Distance on the map / Actual distance
We take
3.2 cm / 400,000 cm
Simplifying the scale gives us:
Scale = 1 / 125,000
So, the scale of the map is 1:125,000