I uploaded the answer to
a file hosting. Here's link:
bit.
ly/3gVQKw3
The answer is A) 28
Set up a proportion based on the triangle side lengths. I chose to put the smaller ones over the bigger ones:

Then cross multiply to get 1344-42x = 6x
Add 42x to both sides to isolate the x changing the equation to 13444 = 48x
Divide both sides by 48 to get x = 28
By subtract this problem, I got answer C .44.22.Right?
The diagonal is the distance between opposite corners...
d=x^2+y^2
d^2=260100
d=510 feet