Question

1.Площа прямокутника дорівнює 27см одна сторона його дорівнює 6 см. Знайти периметр прямокутника

Answer 1

S=a*b
a=S:b
a=27:6
a=4,5
P=(a+b)*2
P=(6+4,5)*2
P=21

Answer 2

Calculation of Rectangle Perimeter

To find the perimeter of a rectangle, we need to know the lengths of its sides. In this case, we are given that one side of the rectangle is 6 cm. However, we need the length of the other side to calculate the perimeter.

Let's assume the length of the other side is 'x' cm. According to the given information, the area of the rectangle is 27 cm². The formula for the area of a rectangle is length multiplied by width:

Area = length × width

Substituting the given values, we have:

27 cm² = 6 cm × x cm

To find the value of 'x', we can rearrange the equation:

x cm = 27 cm² / 6 cm

Simplifying the equation, we get:

x cm = 4.5 cm

Now that we know the lengths of both sides of the rectangle, we can calculate its perimeter. The formula for the perimeter of a rectangle is:

Perimeter = 2 × (length + width)

Substituting the values, we have:

Perimeter = 2 × (6 cm + 4.5 cm)

Calculating the expression inside the parentheses:

Perimeter = 2 × 10.5 cm

Finally, calculating the perimeter:

Perimeter = 21 cm

Therefore, the perimeter of the given rectangle is 21 cm.