& lt; p> Length of a rectangle is 15 cm, and width is 3 times less. Calculate perimeter and the area of a rectangle. & lt;/p> short record please

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A = 15 cm of b = cm, by 3 times more than P = S cm = b cm² = 15 × 3 = 45 cm width P = (15 + 45) × 2 = 120 cm S perimeter = 15 × 45 = 675 cm²
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Answer add