Question

Ширина прямоугольника 28 см что составляет семь теринадцатых длины Найдите периметр и площадь

Answer 1

★ 28 ÷ (7/13) = (28 * 13)/7 = 4 * 13 = 52 см – длина прямоугольника.
★ Р = 2 * (52 + 28) = 2 * 80 = 160 см – периметр
★ S = 28 * 52 = 1456 см² – площадь

Answer 2

Calculation of Rectangle Dimensions

To find the perimeter and area of a rectangle, we need to know its width and length. In this case, the width of the rectangle is given as 28 cm, and it is stated that the length is seven-thirteenths of the width.

Let's calculate the length of the rectangle first. The length can be found by multiplying the width by the fraction representing seven-thirteenths:

Length = (7/13) * Width

Substituting the given width value of 28 cm into the equation, we can calculate the length:

Length = (7/13) * 28 cm

To find the perimeter and area, we need the values of both the width and length.

Calculation of Perimeter

The perimeter of a rectangle is the sum of all its sides. In this case, the rectangle has two sides of width and two sides of length. The formula for calculating the perimeter of a rectangle is:

Perimeter = 2 * (Width + Length)

Substituting the given values, we can calculate the perimeter:

Perimeter = 2 * (28 cm + Length)

Calculation of Area

The area of a rectangle is found by multiplying its width by its length. The formula for calculating the area of a rectangle is:

Area = Width * Length

Substituting the given values, we can calculate the area:

Area = 28 cm * Length

Now, let's calculate the length, perimeter, and area of the rectangle.

Calculation Steps

1. Calculate the length: - Length = (7/13) * 28 cm

2. Calculate the perimeter: - Perimeter = 2 * (28 cm + Length)

3. Calculate the area: - Area = 28 cm * Length

Calculation Results

After performing the calculations, we find that: - The length of the rectangle is approximately 15.08 cm. - The perimeter of the rectangle is approximately 86.16 cm. - The area of the rectangle is approximately 423.04 cm².

Therefore, the length of the rectangle is approximately 15.08 cm, the perimeter is approximately 86.16 cm, and the area is approximately 423.04 cm².

Please note that these values are approximate due to rounding.