Question

What would be the distance between two towns if a map is drawn to the scale of 1 : 100, 000 and the distance between 2 towns is 2km?

Answer 1

There are 100 cm in a meter
and 1000 meters in a kilometer

so
a scale of 1:100,000 is
a scale of 1cm: 1km.

The distance on the map between two towns that are 2km apart would be 2 cm.