A scale drawing of an object is the same shape at the object but a different size. The scale of a drawing is a comparison of the length used on a drawing to the length it represents. The scale is written as a ratio. The ratio of two corresponding sides in similar figures is called the scale factor.
Scale factor= length in image / corresponding length in object.
If one shape can become another using revising, then the shapes are similar. Hence, two shapes are similar when one can become the other after a resize, flip, slide or turn. In the photograph below showing the side view of a train engine. Scale factor is `1:200`.
This means that a length of `1` cm on the photograph above corresponds to a length of 200cm or 2 m, of the actual engine. The scale can also be written as the ratio of two lengths.
What is the actual width of the door if the width of the door in photograph is `0.35` cm?

Options

A. `0.7` m
B. `0.7` cm
C. `0.07` cm
D. `0.07` m

Answer

A