
Robert J. answered 06/27/13
Certified High School AP Calculus and Physics Teacher
If you sketch the graph, you can find two similar triangles from which you can write:
x/5'5'' = (x+5'3'')/10'6'', where x is the length of the man's shadow.
Solving for x gives you the answer.
Can you finish it now?
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Attn: I didn't use the information "a path that passes at a distance of 3ft from the point directly below a street lamp."