Answer
95 feet
Work Step by Step
For this we really just need to get the ratios. Distance from man to tree #1 is 25ft and it's height is 20ft. Now since we are getting our angle from his eye line which is 5 ft up we have to calculate tree #1 as 15ft.
$15/25 = 0.6$
So for every 1ft the tree is in distance it is 0.6 ft tall. So we get:
$125*0.6 = 90$
Though remember that we calculated from eye level (5ft up) so we have to add on that extra 5ft.
$90+5=95$
Thus our answer is 95ft tall.
