A map has a scale of 1 cm : 12 km. Two cities are 2.1 cm apart on the map, what is the actual distance corresponding to the map distance?
The problem provides the map scale that is commonly reported as it follows: 1 cm as measured on map surface is equal to 12 Km measured on the earth's surface.
The problem provides you the distance between two points 0f 2.1 cm as measured on the surface on map and you need to determine the distance on the earth's surface such that:
distance on earth's surface = 2.1*12 = 25.2 Km
Hence, evaluating the distance on earth's surface between two points under given conditions yields 25.2 Km.