The ratio of width to length of a rectangle is 2:5, the ratio of width to length is 12 square decimeters, and the area of the rectangle is () square decimeters In five minutes, it will be handed in tomorrow! 1. As shown in the figure, in two identical rectangles, the area of the shadow part is (). 2. The area of the object () or the plane figure () is called their area. 3. Cut out the largest circle in a square with an area of 8 square centimeters, How many square centimeters is the area of a circle? 4. The perimeter of a rectangular parking lot is 128 meters, the width is three fifths of the length. How many square meters is the area of this rectangle?

The ratio of width to length of a rectangle is 2:5, the ratio of width to length is 12 square decimeters, and the area of the rectangle is () square decimeters In five minutes, it will be handed in tomorrow! 1. As shown in the figure, in two identical rectangles, the area of the shadow part is (). 2. The area of the object () or the plane figure () is called their area. 3. Cut out the largest circle in a square with an area of 8 square centimeters, How many square centimeters is the area of a circle? 4. The perimeter of a rectangular parking lot is 128 meters, the width is three fifths of the length. How many square meters is the area of this rectangle?

12 ÷ (5-2) = 4 (decimeter)
4 × 5 = 20 (decimeter)
4 × 2 = 8 (decimeter)
20 × 8 = 160 (square decimeter)
1. Please don't have any pictures
I don't know
3.3.14 × (8 △ 2) & sup2; = 50.24 (cm2)

A rectangular piece of land is 120 meters long and 10 meters wide. How many square meters is the area of this piece of land?

Length = 120
Width = 110
Area = 120 * 110 = 13200
Hello, does length 120 refer to circumference? If so, the answer is yes
Let the length be x and the width be y
2X+2Y=120
X-Y=10
So x = 35, y = 25
So area = 35 * 25 = 875

The perimeter of a rectangular piece of land is 120, in which the width ratio is one third of the length. How many square meters is the area of this piece of land?

Let the length be X
Width = (1-1 / 3) x = 2 / 3x
2*(x+2/3x)=120
x=36
The area is 36 * 2 / 3 * 36 = 864

The perimeter of a rectangular land is 120 meters, of which the width ratio is 3 / 1. The area of this land is () square meters?

120/2=60
60/4=15
15x3=45
15x45=675

The perimeter of a rectangular piece of land is 120 meters, of which the width ratio is 1 / 3 of the length. How many square meters is the area of this piece of land

It's the simplest way to solve the equation. Let's set the width x and length y, and the two equations are x + y = 60 and Y-X = 1 / 3Y, so x = 24, y = 36 and the area is 24 * 36 = 864

The length of a rectangle is 9 / 10 meters, and the width ratio is 1 / 3 of the length. How many square meters is the area of the rectangle? (process)

The perimeter of a rectangle is 120 meters, of which the width ratio is 1 / 3. The area of this land is () square meters

The perimeter of a rectangle is 120 meters, of which the width ratio is 1 / 3. The area of this land is (864) square meters

The perimeter of a rectangle is 40cm, the width ratio is 1 / 3, and how many square meters is the area of the rectangle?

Length + width = 40 △ 2 = 20cm
Length = 20 (1 + 1-1 / 3) = 12cm
Width = 20-12 = 8 cm
Area = 12 × 8 = 96 square centimeter

How many square meters is the area of a rectangular piece of land with a width ratio of 1 / 3?

Too few conditions
If the length is x, the width is 2 / 3x and the area is 2 / 3x ^ 2

The school has a rectangular experimental field. If the length of the experimental field increases by 9 meters or the width increases by 3 meters, the area will increase by 54 square meters
How many square meters

Suppose the original length is x meters and the width is y meters
From the theme
(x+9)y-xy=54
x(y+3)-xy=54
x=18
y=6
S=xy=18*6=108 m^2