The scale of the map is 1:4000000
Scale of a map
From the question, we are to determine the scale of the map
From the given information,
3cm on the map correspond to 120 km
First, we will convert 120 km to cm
120 km = 120000 m
120000 m = 12000000 cm
Thus,
3cm on the map correspond to 12000000 cm
Then,
The scale of the map is
3:12000000
Reducing to the lowest term
1:4000000
Hence, the scale of the map is 1:4000000
Learn more on Scale of a map here: https://brainly.com/question/1504153
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