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Problem 16 - Entrance Test

A 15 m wire is bent into a rectangle with length 3 m more than width. What is the width (in meters)?

Correct: A

Let width = x, length = x + 3. Perimeter 2(x + x + 3) = 15 → 4x + 6 = 15 → 4x = 9 → x = 2.25 m.