A rectangle is 80 cm long. Cut out the largest square. Find the perimeter of the remaining figure

A rectangle is 80 cm long. Cut out the largest square. Find the perimeter of the remaining figure

Let the width be x, and the largest square is the square with the width x as the side length, so the perimeter of the remaining rectangle is 2 (80-x) + 2x = 160, so the perimeter of the remaining figure is 160 cm!