The length and breadth of a rectangle are 12 cm and 9 cm, respectively. Its perimeter will be:

A rectangular hall, 142 metre long, is paved with 12425 tiles, each measuring 8 $$\text{dm}^2$$​ (decimetre square). The width of the hall is:

If the length of a rectangular field is increased by 20% and the breadth is reduced by 20%, the area of the rectangle will be 192 $$\text{m}^2$$​. What is the area of the original rectangle?