The scale on a map uses 3 centimeters to represent 4 kilometers. the distance between two towns on the map is 6 centimeters. how many kilometers apart are the towns?

8 km

Explanation:

Scale is defined as the ratio between the distance on a 2D map and the distance on the actual ground surface. It is very widely used in the maps in order to identify the size of the area, as well as the distance between any two places.

In the given question, it says that 3 centimeters in the map represents 4 kilometers in the actual ground.

So, it can be concluded that 6 centimeters in the map corresponds to 8 kilometers in the actual ground.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.