The sum of the lengths of the edges of an octagonal prism with base $4$ cm and height $5$ cm is .

The perimeter of a sector of angle $90°$, whose radius is $14$ cm, is _____ cm. (Round your answer to the nearest whole number)

In a rectangle, the sum of the length and breadth is $\text{'}a\text{'}$ units. The perimeter of the rectangle is _____ units.

The area of a parallelogram is $\text{'}x\text{'}$ sq units. The base of the parallelogram is $\text{'}b\text{'}$ units, then the height of the parallelogram corresponding to side $\text{'}b\text{'}$ is _____ units.

Find the area of a quadrilateral $ABCD$ whose diagonal $AC$ is $10$ cm long and the lengths of perpendiculars drawn from the vertices $B$ and $D$ on $AC$ are $4$ cm and $3$ cm, respectively.

A rectangular grassy plot of length $6$ m and width $4$ m has a gravel path of width $1$ m all around it and inside. Find the cost of gravelling the path at $80$ paisa per ${\text{m}}^2$.

The area of a square field is $36 {\text{m}}^2$. How long would it take for a bird to cross it diagonally flying at the rate of $30\sqrt{2} \text{m/min}$?

The diameter of a semi-circle is $20$ cm. What is the area of the semicircular region in terms of $\mathrm{\pi }?$

Find the volume of a rectangular box having a length of $5$ m, width of $3$ m and height of $4$ m.