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OpenStudy (anonymous):
A man of height 1.7m is walking away in a straight line from a lit lamp post of height 5.1m. Given that he is walking at constant speed of 1m s-1, find the rate of increase of the length of his shadow.
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OpenStudy (asnaseer):
|dw:1336316371360:dw| x is the distance the man has walked away from the lamp l is the length of his shadow
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