what was the error the student made in the scale factor

Question

whats the error? A student is asked to find the scale factor that relates a 10 in. scale model to a 45 ft building. She solves the problem by writing 10in/45ft= 2/9=1/4.5. What error did the student make? What is the correct scale factor?

 

i typed out all the words as they are written on my paper.

Answer 1

She related inches to feet. The units must be the same

45 feet = 540 in

10in / 540in = 1/54