A hollow sphere has a volume of kcm3 and a surface area of kcm2. Calculate the diameter of the sphere.

The diagram above shows a cone with the dimensions of its frustrum indicated. Calculate the height of the cone.

The positions of two countries P and Q are (15°N, 12°E) and (65°N, 12°E) respectively. What is the difference in latitude?

A 120° sector of a circle of radius 21cm is bent to form a cone. What is the base radius of the cone?

The angle of a sector of a circle is 108°. If the radius of the circle is 3\(\frac{1}{2}\)cm, find the perimeter of the sector