Question

Perimeter of a square and rectangle is same. If a side of the square is 15 cm and one side is
18 cm. Find the area of rectangle.​

Answer 1

Your answer mate

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The perimeter of the square = perimeter of the rectangle.

And,

Side of the square = s = 15 cm.

Another side of the rectangle is 18 cm.

Let the breadth be xx and the length of the rectangle is 18 cm. 

Atq,

4s = 2( l + b)4s=2(l+b) 

=>4*15 = 2( 18 + x)4∗15=2(18+x) 

=>60 = 2x + 3660=2x+36 

=>2x = 60 - 362x=60−36 

=>x = \frac{24}{2}x=224 

=>x = 12x=12 

Therefore, 

Length of the rectangle is 12 cm. 

And, 

Area of the rectangle is l * b

= 12 * 1812∗18 

= 216 cm^2216cm2 

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Answer 2

Answer:

peri of sq= peri of rect..... i

side of sq=15

one side of rect= 18

in eq i,

15×4=2(18+b)

15×2-18=b

b=12

area of rect. = lb

=12×18

=216 sq units