Question

two towns that are 31.5km aprt are 3cm apart on a map what is the scale of the map

Answer 1

3 cm on the map represents 31.5 km in reality.

3cm : 31.5 km

1cm :  31.5/3 km

1cm : 10.5km

So the scale on the map is 1cm represents 10.5 km.

Answer 2

Olemakpadu is correct