When the length and width of a rectangle are expanded three times at the same time, the perimeter is 72 cm. How many cm is the perimeter of the rectangle?

When the length and width of a rectangle are expanded three times at the same time, the perimeter is 72 cm. How many cm is the perimeter of the rectangle?

twenty-four

The ratio of length to width of the two rectangles is 2:1. The width of the large rectangle is 3cm more than that of the small rectangle. The perimeter of the large rectangle is twice that of the small rectangle. Calculate the area of the two rectangles

Let the width of the small rectangle be xcm, then the length of the small rectangle be 2xcm, the width of the large rectangle be (x + 3) cm, and the length of the large rectangle be 2 (x + 3) cm. According to the meaning of the question, we can get 2 [x + 3 + 2 (x + 3)] = 2 × 2 (x + 2x), and the solution is: x = 3, then the area of the small rectangle is 2 × 3 × 3 = 18 (cm2); the area of the large square is 2 × (3 + 3) × (3 × 3) = 72 (cm2)

The circumference of a rectangle is 72 cm, and its length is twice its width. How many cm are the length and width of the rectangle

If the width is x cm, the length is 2x cm
2×（x+2x)=72
6x=72
x=12
That is: width is 12 cm, length is 2 × 12 = 24 (CM)