Posted by **Sasha** on Thursday, October 14, 2010 at 12:30pm.

a spotlight on the ground shines on a wall 12 m away. if a man 2m tall walks from the spotlight toward the 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?

- calculus -
**JD**, Monday, December 6, 2010 at 12:25am
0.6

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