The length of a rectangle is increased by 20%, and the width is increased by 10%. What is the percentage change in the area?

Find the area of a square if the length of each side of the square is 3 cm more than the width of a rectangle. The perimeter of the rectangle (whose length is 16 cm) is 37.5% more than the perimeter of an equilateral triangle whose area is 64√3 cm2.

Determine the value of the given expression: 68 × 52 + 73 × 67 - 35 × 25 = ?