Confusing Geometry Problem

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jay2007: Senior | Next Rank: 100 Posts; Posts: 50; Joined: Mon Jul 02, 2007 4:18 pm

by jay2007 » Wed Aug 01, 2007 9:03 am

First piece forms a circle of circumference 2(pie)r. Rest of the wire (40-2(pie)r) forms the square with circumference 40-2(pie)r.

Total area = area of circle + area of square
= (pie)r^2 + ((40-2(pie)r)/4)^2

Simplifying the fraction will result in answer that matches E.

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