We are given the following information
A building has four stories and each story is 15 ft high
So the overall height of the building is
[tex]4\times15=60\: ft[/tex]On the scale drawing, the height of the building is 5 in
Then the scale factor is
[tex]scale\: factor=\frac{5\: in}{60\: ft}=\frac{1}{12}[/tex]Therefore, the correct answer is 1:12