A rectangular board, its length is twice the width, perimeter is 54 cm. How many cm is the length and width

The width of a rectangle is x cm and the length is 2x cm. The meaning of the title is as follows: (x + 2x) × 2 = 54 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 3x × 2 = 54 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 6x △ 6 = 54 △ 6 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 9; the length is

A rectangular board, along its length of different two sides cut 4 cm, cut off the total area of 192 square centimeters. Now this board perimeter is______ Cm

(192 △ 4-4) × 2 = (48-4) × 2 = 44 × 2 = 88 (CM). Answer: the perimeter of this board is 88 cm now. So the answer is: 88

The perimeter of a rectangular colored paper is four-thirds of a meter. It is known that its length is one-half of a meter. How many square meters is the area of this paper?

According to perimeter and length, width = 4 / 3 * 1 / 2-1 / 2 = 1 / 6
Area = length × width = 1 / 6 × 1 / 2 = 1 / 12
So the area is: one twelfth of a square meter

The perimeter of a rectangle is 60. If its width is increased by 25% and its length is reduced by half, the perimeter is the same as the original perimeter, and the area of the original perimeter is calculated

Let the length of the original rectangle be x and the width be y, then there is
(x + y) * 2 = 60 leads to x = 30-y
So there is [(y + 0.25y) + 1 / 2x] * 2 = 60
The solution is y = 20
x=10
So the area of the original perimeter is 200

A rectangular board, its length is twice the width, perimeter is 54 cm. How many cm is the length and width