The circumference of a rectangle is 10 cm, and the ratio of length to width is 3:2. How many square centimeters is its area?

The circumference of a rectangle is 10 cm, and the ratio of length to width is 3:2. How many square centimeters is its area?

Length = 10 / 2 * (3 / 5) = 3
Width = 2
Area = 6 square centimeters

1. The length of a rectangle is 10 meters and the width is 7 meters. The perimeter ratio of the rectangle is (). The width to perimeter ratio is ()
2. Given that a triangle and a parallelogram are of equal base and height, then their area ratio is ()

1. The length of a rectangle is 10 meters and the width is 7 meters. The ratio of the length to the circumference of the rectangle is (10:34). The ratio of the width to the circumference is (7:34)
2. Given that a triangle and a parallelogram are of equal base and height, then their area ratio is (1:2)

Cut a piece of circular paper and put it together into an approximate rectangle with the width equal to the radius and the area unchanged. The perimeter of the rectangle is 33.12 meters

The circumference of the rectangle = the circumference of the circle + the diameter of the circle
Therefore, the diameter of the circle = the circumference of the rectangle (3.14 + 1)
Diameter of circle = 33.12 ÷ (3.14 + 1) = 8 (m)
Area of circular paper = 3.14 × (8 △ 2) &# 178; = 50.24 (M2)

Cut a round piece of paper and put it together into an approximate rectangle with the width equal to the radius and the area equal. The circumference of the rectangle is 33.14 cm,
What is the area of the circle?

Circle radius r area π R2
If the area of rectangle = the area of circle π R2
Then the length of rectangle = (33.14 / 2) - R
R*[(33.14/2)-R]=πR2
(33.14/2)-R=πR
16.57/(π+1)=R=4
The area of the circle π R2 = 16 π