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Un article trouvé pour ce sujet.
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Related Rates (streetlamp and shadow) |
2007-11-09 |
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Casey pose la question :
A street light is mounted at the top of a 15ft pole. A man 6ft tall walks away from the pole at a rate of 5ft per second. How fast is the tip of his shadow moving when he is 40ft from the pole?
Stephen La Rocque and Penny Nom lui répond. |
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