For this case we can model the problem as two similar rectangle triangles.
We then have to simulate triangles:
[tex]x / 400 = 10 / (10 + 190)
[/tex]
Rewriting we have:
[tex]x / 400 = 10 / (200)
[/tex]
From here, we clear the value of x:
[tex]x = (10 / (200)) * (400)
x = 20 feet[/tex]
Answer:
the tree is 20 feet tall
