Sunday
December 21, 2014

Homework Help: Calculus

Posted by Nikki on Sunday, September 12, 2010 at 1:59pm.

(It's a related rate question)

A man 6ft tall walks away from a lamp post (15ft) at 5ft/sec. How fast is his shadow lengthening?

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I have the picture, and the constants, the man and the lamp post. I have 5ft/sec as dw/dt, and I know I'm looking for ds/dt, the rate of the shadow.

Problem is, I don't know the actual equation to figure this out. Help please?

Thanks!

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