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Mathematics 23 Online
OpenStudy (anonymous):

A spotlight on the ground shines on a wall 12m away. If a man 2m tall walks from the spotlight toward a building at a speed of 1.6m/s, how fast is the length of his shadow on the building decreasing when he is 4m from the building? I'm having trouble drawing the diagrams and just visualising.

OpenStudy (anonymous):

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