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March 31, 2015

March 31, 2015

Posted by **Anonymous** on Monday, September 26, 2011 at 7:10pm.

- math -
**Steve**, Tuesday, September 27, 2011 at 1:58pmarea w/o walk: 46*30 = 1380

area w/walk (46+2w)(30+2w)

So, we have

(46+2w)(30+2w) - 1380 = 240

4w^2 + 152w + 1380 - 1380 = 240

4w^2 + 152w - 240 = 0

w^2 + 38w - 60 = 0

w = -19 + sqrt(421) = 1.5

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