Perimeter of a square and a rectangle is same. If a side of the square is 15cm and one side of the rectangle is 18cm, find the area of the rectangle.
Length of rectangle = 18 cm
Side of square = 15 cm
Perimeter of square = 4 × 15
= 60 cm
Perimeter of rectangle = Perimeter of square
2 × (l + b) = 60
18 + b = 30
b = 12 cm
Area of rectangle = 18 × 12
= 216 sq.cm