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A person of height 1.6 meters stands in front of a lighted electric post of height of 20 meter. If the shadow is of length of 4 meter, how far is the person from the foot of the post ? Please see this link for the image. https://drive.google.com/file/d/0B1WQDP19uyTWeWdtWWdfZFRqTWM/edit?usp=sharing