Answer:
The shadow of the building = 192 ft.
Step-by-step explanation:
∵ There is a proportional relation between the heights of the tree and the building and their shadows
∴ Height tree/height building = shadow tree/shadow building
[tex]\frac{5}{80}=\frac{12}{x}[/tex]
x = [tex]\frac{(80)(12)}{5}[/tex]= 192 ft ⇒ x is the length of the shadow of the building