The ratio of the areas of the circumcircle and incircle of an equilateral triangle is

The area of four walls of a room is $660 {\mathrm{m}}^2$ and its length is twice its breadth. If the height of the room is $11 \mathrm{m}$ then the area of the floor (in ${\mathrm{m}}^2$) is

When a metal wire is bent in the form of a square it covers an area measuring $484{ \mathrm{cm}}^2$. If the same, wire is bent in the form of a circle, area enclosed by it is:

$\left[ \text{Take} \mathrm{\pi }=\frac{22}{7}\right]$