Tom made a scale drawing of his bedroom. The his room is 3 millimeters long in the drawing. The actual room is 12 meters long. What scale did Tom use for the drawing?
To find the scale, we can set up a proportion using the lengths in the drawing and the actual length:
3 millimeters (drawing) = 12 meters (actual)
Let x represent the scale factor.
3/x = 12/1
Cross multiply:
3 * 1 = 12 * x
3 = 12x
Divide by 12:
3/12 = x
x = 1/4
Therefore, Tom used a scale of 1:4 for the drawing of his bedroom.