All edges of a square pyramid are of the same length and its height is $12$ centimetres. What is its volume?

What is the surface area of a square pyramid of base perimeter $64$ centimetres and volume $1280$ cubic centimetres?

What is the relation between the dimensions of the sector we start with and the cone we end up with?

What are the radius of the base and slant height of a cone made by rolling up a sector of central angle $60°$ cut out from a circle of radius $10$ centimetres?

What is the central angle of the sector to be used to make a cone of base radius $10$ centimetres and slant height $25$ centimetres?

What is the ratio of the base-radius and slant height of a cone made by rolling up a semicircle?

What is the area of the curved surface $\left({\mathrm{cm}}^2\right)$ of a cone of base radius $12$ centimetres and slant height $25$ centimetres?

What is the surface area of a cone of base diameter $30$ centimetres and height $40$ centimetres?
(Note: Consider $\mathrm{\pi }=\frac{22}{7}$)