Question

perimeter of a square and the perimeter of the rectangle is same . if a side of the square is 15 cm and one side of the rectangle is 18cm find the area of the rectangle​

Answer 1

Answer:

216 cm²

Step-by-step explanation:

Let the perimeter of the square and that of the rectangle be 'x' cm each.

Now, we know that the one side of the square = 15 cm

Also, Perimeter of square = 4a, where 'a' is the side of square

=> x = 4 * 15 = 60 cm

Perimeter of rectangle = Perimeter of square = 60 cm

=> Perimeter of rectangle = 60 cm

=> 2 ( l + b) = 60 cm

=> 2 ( 18 + b ) = 60 cm

=> 18 + b = 30 cm

=> b = 12 cm

Now, area of rectangle = l * b = 18 * 12 = 216 cm²

Answer 2

Step-by-step explanation:

perimeter of square =4×15=60

perimeter of rectangle =60

• 60=2(18+x)
• 60/2=18+x
• 30-18=x
• x=12cm