Above video explains the concept of simple scale in geography
Basically, there are three types of scales-

1- Statement scale
2-Representative fraction (R.F)
3-Graphical scale

In above video, we learn the steps used for making simple scale

Step-1: Calculation of RF= Paper distance / Ground distance
Step-2: Representation of paper distance
Step-3: Drawing of scale

Measuring units-

1- Matrix scale - K H D M D C M
2- English scale- M F Y F I