Question

Кухня имеет форму квадрата со стороной 4,76 метров .Определите площадь и полезный периметр кухни, если дверной проем двери имеет длину 0,9м, а ширина окна составляет 1,45 м. Помогите с задачей, вообще не понимаю!!! :-)

Answer 1

Найдем площадь
$S=4.76*4.76=22.6576$ $M^{2}$

Найдем полезный периметр
$P=4*4.76-1.45-0.9=16.69$

Answer 2

Problem Analysis

To find the area and useful perimeter of the kitchen, we need to calculate the area of the square kitchen and subtract the area of the door and window. The useful perimeter will be the sum of all four sides of the kitchen minus the length of the door.

Calculation

Given: - Side length of the square kitchen = 4.76 meters - Length of the door = 0.9 meters - Width of the window = 1.45 meters

Area of the Kitchen

The area of a square is calculated by multiplying the length of one side by itself. Therefore, the area of the kitchen is 4.76 meters x 4.76 meters = 22.6576 square meters.

Area of the Door

The area of the door is calculated by multiplying its length by its width. Therefore, the area of the door is 0.9 meters x 1.45 meters = 1.305 square meters.

Area of the Window

The area of the window is calculated by multiplying its length by its width. Therefore, the area of the window is 1.45 meters x 1.45 meters = 2.1025 square meters.

Useful Area of the Kitchen

To find the useful area of the kitchen, we subtract the area of the door and the area of the window from the total area of the kitchen. Therefore, the useful area of the kitchen is 22.6576 square meters - 1.305 square meters - 2.1025 square meters = 19.25 square meters.

Perimeter of the Kitchen

The perimeter of a square is calculated by multiplying the length of one side by 4. Therefore, the perimeter of the kitchen is 4.76 meters x 4 = 19.04 meters.

Useful Perimeter of the Kitchen

To find the useful perimeter of the kitchen, we subtract the length of the door from the total perimeter of the kitchen. Therefore, the useful perimeter of the kitchen is 19.04 meters - 0.9 meters = 18.14 meters.

Therefore, the area of the kitchen is 22.6576 square meters, and the useful perimeter of the kitchen is 18.14 meters.

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