Question

ПЕРИМЕТР ПРЯМОУГОЛЬНИКА 48СМ.НАЙДИ ПЛОЩАДЬ ПРЯМОУГОЛЬНИКА ЕСЛИ ЕГО ШИРИНА В 3 РАЗА МЕНЬШЕ ДЛИНЫ?

Answer 1

(х+3х)*2=48
4х*2=48
4х=48:2
4х=24
х=6-ширина;
6*3=18 см.-длина;
18*6=108 см.в кв.
Ответ: S=108 см. 

Answer 2

(х+3х)* 2=48
4х *2=48
4х=48:2
4х=24
х=6
6 см это ширина
6*3=18см(длина)
18*6=108 см в кв.
Ответ: S=108 см 

Answer 3

Perimeter of a Rectangle

To find the perimeter of a rectangle, you need to know the lengths of its sides. In this case, we are given that the perimeter of the rectangle is 48 cm and that its width is 3 times smaller than its length.

Let's denote the length of the rectangle as L and the width as W.

We can set up the equation for the perimeter of a rectangle as follows: Perimeter = 2(L + W)

Since we know that the width is 3 times smaller than the length, we can express the width in terms of the length: W = L/3

Substituting this value into the perimeter equation, we get: 48 = 2(L + L/3)

To solve this equation, we can simplify it by multiplying both sides by 3: 144 = 6L + 2L

Combining like terms, we have: 144 = 8L

Dividing both sides by 8, we find: L = 18

Now that we know the length of the rectangle is 18 cm, we can find the width by substituting this value into the equation for the width: W = 18/3 = 6

Therefore, the length of the rectangle is 18 cm and the width is 6 cm.

Area of a Rectangle

To find the area of a rectangle, you multiply its length by its width. In this case, the length is 18 cm and the width is 6 cm.

Using the formula for the area of a rectangle, we have: Area = Length * Width

Substituting the given values, we get: Area = 18 * 6 = 108 cm^2

Therefore, the area of the rectangle is 108 square centimeters.