Question

The perimeter of a square is $40$ cm. A rectangle of length $20$ cm has the same area as that of the square. Find the breadth of rectangle.

Answer 1

Perimeter of a square $4a=40\Rightarrow a=10cm$
$Area=a^2=100c{m}^2$
Area of Rectangle $=length\times breadth=100$
$\Rightarrow B=100/20=5cm$