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September 1, 2014

September 1, 2014

Posted by **Prabhakaran** on Monday, October 8, 2012 at 3:30pm.

- math -
**Steve**, Monday, October 8, 2012 at 4:09pmdraw a diagram. using similar triangles, if the length of the shadow is x, and the distance to the lamp is y,

x/6 = (x+y)/16

16x = 6x + 6y

10x = 6y

x = 3/5 y

since y is changing at -5ft/sec

x is changing at -3ft/sec

no matter where the man is.

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