[{"title": "Area of a Rectangle", "content": "Find the area of a rectangle with length 15 cm and width 8 cm. Area = length × width.", "solution": "A = 15 × 8 = 120 cm²"}, {"title": "Perimeter of a Rectangle", "content": "Find the perimeter of the same rectangle. P = 2(length + width).", "solution": "P = 2(15 + 8) = 2(23) = 46 cm"}]