Question

Find the value of x if: a square’s perimeter is (x+9) cm and its side length is 20 cm.

Answer 1

Given:

Perimeter of a square=(x+9) cm

Side of a length=20 cm

To find:

x=?

Solution:

Perimeter of a Square=4×side

(x+9) =4×20

(x+9) =80

x=80-9

x=71 cm

Therefore,

Value of x is 71 cm........

Answer 2

Answer:

perimeter of square = 4side

(x + 9) = 4(20)

(x + 9) = 80

x + 9 = 80

x = 80 - 9

x = 71

The value of x is 71