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OpenStudy (anonymous):
A street light is mounted at the top of a 15 foot tall pole. A man 6 ft tall walks away from the pole with a speed of 7 ft/s along a straight path. How fast is the tip of his shadow moving when he is 40 ft from the pole?
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OpenStudy (ranga):
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OpenStudy (ranga):
Assume OC = y (a variable to start with) Then CD = x - y Triangles DCB and DOA are similar. Use that fact to find the relationship between x and y first.
OpenStudy (ranga):
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