Question

Площадь прямоугольника равна 7200дм в квадрате,а длина 80дм . Найди периметр Срочно помогите

Answer 1

S = 7200 дм²; а = 80 дм.

b = S/a = 7200/80 = 90(дм)

Р = 2(а+b) = 2(80+90) = 340(дм)

Ответ: 340 дм.

Answer 2

Ответ:

340дм

Пошаговое объяснение:

7200÷80=90см ширина

Р=2(а+b)

2(90+80)=340дм

Answer 3

Calculating the Perimeter of a Rectangle

To find the perimeter of a rectangle, we can use the formula:

Perimeter = 2 * (length + width)

Given that the area of the rectangle is 7200 square decimeters and the length is 80 decimeters, we can calculate the width of the rectangle using the area and then find the perimeter.

Calculations

First, let's calculate the width of the rectangle using the given area and length.

The formula for the area of a rectangle is:

Area = length * width

We can rearrange this formula to solve for the width:

width = Area / length

Substituting the given values: width = 7200 / 80 width = 90 dm

Now that we have the length and width, we can calculate the perimeter using the formula:

Perimeter = 2 * (length + width) Perimeter = 2 * (80 + 90) Perimeter = 2 * 170 Perimeter = 340 dm

So, the perimeter of the rectangle is 340 decimeters.