Mention the properties of rectangle.

Mention the properties of square:

The sides of a rectangle are in the ratio  $3:5$. If the area of the rectangle is  $960 {\mathrm{m}}^2$, then what is the perimeter of this rectangle?

The area of square field is $1764 {\mathrm{m}}^2$. How much will it cost to build a wall around it at the cost of $₹240$ per metre?