A 20" ladder needs to have a 5:2 ratio of distance to building and distance to window in order to be safe. How far away does the ladder need to be from the building? How far up the building should the ladder be placed?

b=dist from bldg

h=how far up bldg ladder goes

L=ladder length (20)

pythag theorem for triangle:

sqrt (b^2+h^2) = L

Actually, you need to know how far off the ground the window is to do this problem ... I think you forgot that!