[{"title": "Area of a Rectangle", "content": "Find the area of a rectangle with length 10 cm and width 5 cm. Area = length × width.", "solution": "A = 10 × 5 = 50 cm²"}, {"title": "Perimeter of a Rectangle", "content": "Find the perimeter of the same rectangle. P = 2(length + width).", "solution": "P = 2(10 + 5) = 2(15) = 30 cm"}]