1. if the length of a rectangle is decreased by 4 cm and the width is increased by 5 cm, the result will be a square, the area of which will be 40 cm2 greater than the area of the rectangle. find the area of the rectangle. 2.the perimeter of a rectangle is 30 cm. if its length is decreased by 3 cm and its width is increased by 5 cm, the area of the rectangle will decrease by 8 cm2. find the area of the original rectangle.