Find the number of faces of the given pyramid

  

The surface area of a sphere of radius $7 cm$ is

(Take $\pi =\frac{22}{7}$)

The perimeter of the base of a square pyramid is $96 \mathrm{cm}$ and its height is $16 \mathrm{cm}$. What is the slant height?

The figure of a square sheet paper is shown below. Length of one side of the paper sheet is $36 \mathrm{cm}$ and $AB=10 \mathrm{cm}$. The shaded portion is cut out and folded into a square pyramid. If the slant height of the pyramid is $k \mathrm{cm}$, find $k$.

The given figure is the lateral face of a square pyramid. $AB=AC=25$ centimeters and $BD=DC=15$ centimeters. What is the length of its base edge? [Take $\sqrt{2}=1.414$]

A hall is $15 \mathrm{m}$ long and $12 \mathrm{m}$ broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of the four walls, the volume of the hall in $\mathrm{cu} \mathrm{m}$ is

If a regular tetrahedron has height $10 \mathrm{cm}$ then find it's side.