2/3 of a class is wearing suspenders . 2/6 of the suspender-wearing students also were wearing caps. what fraction of the students are wearing suspenders and caps

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm