posted by Cynthia .
the distance between north bay and sudbury is about 125km. If they are 10 cm apart on a road map, what is the map scale?
set up the ratio
125 km : 10 cm
= 12.5 km : 1 cm
so 1 cm on your map is 12.5 km in the real world.
BTW, hello from a fellow Ontarian.