A piece of iron wire is 24 meters long. It should be enclosed into a rectangle. The length is 1.4 times the width. The area of this rectangle is () square meters?

24 / 2 = 12m
12/(1+1.4)
=12/2.4
=5 meters
5 * 1.4 * 5 = 35 square meters

The perimeter of a rectangle is 24 cm, and the ratio of length to width is 2:1. How many square centimeters is the area of the rectangle?

One is: 24 △ 2 △ 2 (1 + 2), = 24 △ 2 △ 3, = 4 (CM), length: 4 × 2 = 8 (CM), width: 1 × 4 = 4 (CM), area of rectangle: 8 × 4 = 32 (square cm), answer: area of rectangle is 32 square cm

Taotao uses 24 cm long wire to form a rectangle. The length of the rectangle is three times the width. What is the area of the rectangle

I'll tell you the answer first

Cut a piece of paper with a side length of 10 cm into the largest circle. What percentage of the area of the circle is that of the square?

The area of the circle: S = π R2 = 3.14 × (10 △ 2) 2 = 78.5 (square centimeter); the area of the square: S = A2 = 10 × 10 = 100 (square centimeter); 78.5 △ 100 = 78.5%; answer: the area of the circle is 78.5% of the area of the square

Use a piece of square paper with a side length of 14cm to cut it into a circle with the largest diameter. What is the area of this circle?

Circle diameter = square side length = 14 cm
Area of circle:
3.14×（14÷2）²
=3.14×49
=153.86 (cm2)

Subtract the largest circle from a 50 cm square. What is the area of the circle?

π * r * r = 3.14 * 25 * 25 = 1962.5 square centimeter

Draw the largest circle in a square with a side length of 20 cm and find the area of the circle

Inscribed circle is OK, radius is 10, area is 100

Cut the largest circle from a square sheet of iron with a side length of 20 cm. What's the area of the circle? What's the utilization rate of this square sheet of iron

What is the radius of the circle
20 △ 2 = 10 cm
What is the area of a circle
10 × 10 × 3.14 = 31 square centimeter
What is the area of a square
20 × 20 = 400 square centimeter
What is the utilization rate of this square sheet of iron
314÷400×100％＝78.5％

Use a 25.12 decimeter iron wire to make a square. Cut out the biggest circle in the cardboard. What's the circumference and area of the circle

The diameter of the circle is just the length of the side of the square
So the diameter of the circle is 25.12/4
So circumference = π d = 3.14x6.28 = 19.72dm
Area = π (D / 2) ^ = 3.14x3.14x3.14 = 30.96dm & # 178; = 0.3096m & # 178;

Make a circle of 100 cm square iron wire, what is the circumference and area of the circle

Perimeter: 4x100 = 400 (CM)
Diameter: 100 / 2 = 50 (CM)
the measure of area:
3.14x50x50 = 7850 (cm2)

A piece of iron wire is 24 meters long. It should be enclosed into a rectangle. The length is 1.4 times the width. The area of this rectangle is () square meters?