Solution: Let the length and width of the rectangle be $ l $ and $ w $, respectively. The area is $ lw = 100 $, and the perimeter is $ P = 2(l + w) $. To minimize $ P $, the rectangle should be a square (by the AM-GM inequality or calculus). So, set $ l = w $:

Tue, 05 May 2026 09:08:30 +0000

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