The circumference of a rectangle is 208 cm, and the ratio of its length to width is 4 5 1 2. Find it

The circumference of a rectangle is 208 cm, and the ratio of its length to width is 4 5 1 2. Find its area?

1) First divide the circumference by 2, which is equal to one length and one width, and then distribute it proportionally, because 4 5:1 2 = 8:5

3) Calculation: (208 2) 8 13 = 64

So the area is: 64 40 = 2560 (square centimeters).

Set the length x cm and the width y cm

Circumference = 2 (x + y) = 208, so x + y = 104x: y = 4 5: 1 2 = 8 5, so 5 x = 8y simultaneous two equations get: x = 64, y = 40

So the area xy=2560 square centimeters.

Let the length of the rectangle be x*4 5 and the short length be x*1 2, then the circumference will be 2*(x*4 5+x*1 2)=208cm

x=80cm

then x*4 5*x*1 2=2560 square centimeters.

Let its length be x and its width be y, then list the system of equations:

x/y=8/5

2x+2y=208

Solve the system of equations: x=64, y=40

Then its area is: x*y=40 64=2560 square centimeters = square meters.

By the ratio of length and width 4 5:1 2 = 8:5

Length: 208 2 8 13 = 64 (cm).

Width: 208 25 13 = 40 (cm).

Area: 64 40 = 2560 (square centimeters).

Because the circumference of the rectangle is 2 (length + width) = 48, so length + width = 24 cm, because length: width = 4:1, so length = 24 4 5 = cm width = cm, the area is square centimeters.

The circumference of a rectangle is 48 centimeters, and its ratio of length to width is 4:1, find the area of this rectangle.

Solution: Let the length of the rectangle be a and the width be b

1、 a+b）x2=48

a+b=24

2、 a÷b=4:1=4

a=4b, then: 4b+b=24

5b=24b=a=

s=ab=A: This rectangle has an area of square centimeters.

Because the circumference of the rectangle is equal to the length plus, and the width is multiplied by two, so the width of the Yangtze River should be equal to 48 divided by 2 = 24 centimeters, and the ratio of length and width is 4:1, so the length of the rectangle should be equal to 24 4 5, which is equal to centimeters, and the width of the rectangle is equal to 24 1 5, which is equal to centimeters, and its area is equal to 19.2 4.8.

This one has a rectangular area of 35 square centimeters.

7 parts, 5 parts wide, each part long.

24 2 (7+5) = 1 cm.

Length: 7*1=7 cm.

Width: 5*1=5 cm.

Rectangular lack of envy area: 7 * 5 = 35 square centimeters.

240 2 = 120 (cm).

120 (7+5) = 10 (cm).

10*7=70 (cm) ......Long.

10*5=50 (cm) ......Wide.

70*50=3500 (square centimeters) ......Area, 4,240 2 7 12 = 70cm

240÷2×5/12=50cm

Area = 70 50 = 3500 square centimeters, 2,240 2 = 120 50 70 = 3500, 2, length 240 * 7 12 * 1 type ant 2 = 70 width 240 * 5 12 * 1 2 = 50

Area = length * width = 3500 cm2,1, length + width = 240 2 = 120 cm length = 120 (7 + 5) 7 = 70 cm.

Width = 120-70 = 50 cm.

Area = 70 50 = 3500 square centimeters, 1,7x + 5x = 240 2x = 10 7x = 70

5x=5070*50=3500,0, the circumference of a rectangle is 240 cm, and the ratio of length and width is 7:5, find the area of this rectangle.

If you want it now, you can write the equation instead of the answer.

Length = Width =

Area = 3 * square cm

Please click on the Wang Belt Grip to answer the dilemma celebration case.

Let the length of the rectangle be x cm, then the width is 2x 5 cm, and the equation is: (x+2x 5) 2=112

Solve equation 14x 5=112

x = 112 5 14 = 40 cm (length), 2x 5 = 2 5 40 = 16 cm (width), rectangular area = length and width = 40 16 = 640 square centimeters.

Because the circumference of the rectangle is c=2 (length + width), you can get length + width = 112 2 = 56 cm, and the known ratio is 5:2, so length = 56 5 7 = 40, width = 56-40 = 16. The area is 40 16 = 640 square centimeters.

Length: 16 5 2 40 cm.

Width: 16 2 2 16 cm.

Area: 40 16 640 cm

Set the length to x cm.

x：480/2-x=5：3

3x=5(240-x)

8x=1200

x = 150 width = 240-150 = 90 cm = 9 dm, area = 15 * 9 = 145 square decimeters.

Length and width: 480 2 = 240 (cm).

Length: 240 5 (5+3)=150 (cm) Width: 240-150=90 (cm).

Area: 150 90 = 13500 (square centimeters).

Let the length be 5x cm, the width be 3x cm, and the circumference 480 = 2 * (5 x + 3 x) x = 30

Area 15x 2=13500cm2

Length: 60*5 2=150

Width: 60*3 2=90

Area: 150 90 = 13500 (square centimeters).

240 2 = 120 (cm).

120 (7+5) = 10 (cm).

10*7=70 (cm) ......Long.

10*5=50 (cm) ......Wide.

70*50=3500 (square centimeters) ......Area.

Length + width = 240 2 = 120 cm.

Length = 120 (7 + 5) 7 = 70 cm.

Width = 120-70 = 50 cm.

Area = 70 50 = 3500 square centimeters.