Black vultures excel at gliding flight; they can move long distances through the air without flapping their wings while undergoing only a modest drop in height. A vulture in a typical glide in still air moves along a path tipped 3.5∘ below the horizontal.
tan(3.5°) = x/100
x = 100*tan(3.5°)
x =~ 6.1162620150484306194257280811981