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January 31, 2015

January 31, 2015

Posted by **Jammy** on Tuesday, October 30, 2012 at 9:35pm.

- Geometry -
**Steve**, Tuesday, October 30, 2012 at 9:58pmif the pen has dimensions x by y, with x along the barn, then

x+2y = 115

the area a is thus

a = xy = (115-2y)y

this is a parabola, with maximum at y=115/4

so, x = 115/2

so, a pen 115/4 by 115/2 gives the maximum area

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