Answer:
4 cm on map
Step-by-step explanation:
since 1 cm on map represents 20 km on road, we can either use proportion or ratio to solve this, I'm using direct proportion
map : road
1 : 20
x : 80
20x = 80
x = 80/20
x =4
so 80 km on road is 4 cm on map
please give brainliest