What is the scale of a drawing when marked 1'=1"?

The scale of a drawing marked as 1'=1" means that one foot on the drawing equals one inch in reality. This is a common scale used in engineering and architectural drawings to represent large objects or the layout of spaces in a more manageable size on paper.

To understand the scale, it's essential to recognize the relationship between feet and inches. There are 12 inches in a foot, so when you express the scale as a ratio, it is represented as 1 inch of drawing representation for every 12 inches of the actual object. Therefore, the scale can be described as 1:12, indicating that for every unit of measurement on the drawing (1 inch), the actual size is 12 times greater (1 foot).

In this case, identifying that the correct answer represents this ratio allows you to determine the scale of the drawing accurately, confirming the proper relationship between the dimensions on the drawing and the real-world dimensions of the object being depicted.