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Let the length and breadth of the rectangle be 5x cm and 4x cm, respectively According to the question, 2 × (5x + 4x) = 144 Or, x = 72/9 = 8 Therefore, each side of the square = 1.25 × 4x = 40 cm Perimeter of the square = 4 × 40 = 160 cm Required difference = 160 – 144 = 16 cm
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