Question 672463
Use similar triangles to get the distance, x, from the bottom of the ladder to the point below the man 
(1) x/12 = 6/20 or
(2) x = 3.6
Then the distance from his feet to the wall is 2.4'.
Using Pythagoen theorem we can get the height of his feet, h, as
(3) h^2 = 12^2 - 3.6^2 or
(4) h = 1.2*sqrt(91) or
(5) h ~ 11.45'
I don't like the funny numbers, but unless I read the problem wrong, the answers must be correct.
Answer: The man's feet are 2.4 ft from the wall and about 11.45 ft off the ground.