Answer:
108 ft
Step-by-step explanation:
The total length in inches of the perimeter of the model is ...
7 in + 3 in + 3 in + 5 in = 18 in
The total length of the walkway will have the same ratio to this perimeter that the corresponding sides have:
EF/AB = 42 ft/(7 in) = (walkway length)/(18 in)
Multiplying by 18 in, we get ...
walkway length = (42 ft)(18 in)/(7 in)
walkway length = 108 ft
