The length of a hall is 15 metres. It is represented by a line 3 centimetres long on a scale drawing. What scale is used?

Answer 1

To find the scale used, we can set up a proportion comparing the length of the hall in real life to the length of the line on the scale drawing.

Let x be the scale used.
15/3 = x/1

To solve for x, we cross multiply and get:
3x = 15
x = 5

Therefore, the scale used is 1:5.