The perimeter of a square is $48\, cm$. The area of a rectangle is $4\, cm^2$ less than the area of the square. If the length of the rectangle is $14\, cm$,then its perimeter is.......$cm$.

The diameter of a circular wheel is $7\, m$. How many revolutions will it make in travelling $22\, km$?

$A$ silver wire when bent in the form of a square,encloses an area of $484 \, cm^{2}$. Now if the same wire is bent to form a circle,the area enclosed by the circle would be? (in $cm^{2}$)

An oblong piece of ground measures $19$ $meters$ $2.5$ $dm$ by $12$ $meters$ $5$ $dm$. From the centre of each side,a path $2$ $meters$ wide goes across to the centre of the opposite side. Find the cost of paving these paths at the rate of $Rs.$ $12.32$ per $sq$ $meter$. (in $Rs.$)

The ratio between the areas of two circles is $4: 7.$ What will be the ratio of their radii?

In trapezium $ABCD$,$AB || CD$ and $AB = 2 \, CD$. Its diagonals intersect at $O$. If the area of $\Delta AOB = 84 \, cm^2$,then the area of $\Delta COD$ is equal to (in $cm^2$)