Answer:
see the procedure
Step-by-step explanation:
we know that
The scale factor of the model is 1/30
That means ----> 1 unit in the model represent 30 units in the actual
so
using proportion
Find out how much represent 5 ft in the model
Convert feet to inches
Remember that
[tex]1\ ft=12\ in[/tex]
so
[tex]5\ ft=5(12)=60\ in[/tex]
Let
x -----> the diameter of the circular window in the model house in inches
[tex]\frac{1}{30}=\frac{x}{60}\\\\x=\frac{60}{30}\ in[/tex]
Simplify
[tex]2\ in[/tex]
therefore
The diameter of the circular window in the model house is 2 inches
see the attached figure to better understand the problem