Question

the area of a square and rectangle are equal the perimeter of the square is 420 CM if the length of the rectangle is 125 CM calculate the 3. difference between the perimeter of the square and the rectangle

answer is coming 6.40m2​

Answer 1

Perimeter of a square = 4a = 420 cm
a = 420/4 = 105 cm

Area of square = a^2 = 105^2 = 11025 cm^2
Area of square = area of rectangle
Area of rectangle = 11025 cm^2
Area of a rectangle = l*b
11025 = 125b
b = 11025/125
b = 88.2 cm

Perimeter of rectangle = 2(l+b)
P = 2(125+88.2)
P = 2*213.2 = 426.4 cm

Difference between perimeter of square and rectangle = 426.4 - 420 = 6.4 or 6.40 m^2

Therefore, we got 6.40 m^2.
Hope you understood my answer!