Question

7. The length of the side of a square is (2x + 3)cm. Which of the following represents the perimeter
of the square:

a.(8x + 12)cm
b.(8x + 2)cm
c.(18x + 12)cm
d.NONE OF THESE​

Answer 1

Answer:

8x+12

Step-by-step explanation:

side=a= 2x+3

perimeter of square=4a

 =4(2x+3)=8x+12

Answer 2

Given:

A square with

• Side = (2x + 3) cm

What To Find:

We have to perimeter of the square.

Options:

a. (8x + 12) cm

b. (8x + 2) cm

c. (18x + 12) cm

d. None of these

Formula:

Perimeter = 4 × side

Solution:

Using the formula,

⇒ Perimeter = 4 × side

Substitute the value,

⇒ Perimeter = 4 × (2x + 3) cm

Remove the brackets,

⇒ Perimeter = 4 × 2x + 4 × 3

Multiply 4 and 2x,

⇒ Perimeter = 8x + 4 × 3

Multiply 4 and 3,

⇒ Perimeter = 8x + 12 cm

That is

⇒ Option A

∴ Thus, the perimeter of the sqaure is (8x + 12) cm i.e option A.