A hollow sphere of outer radius of 4 cm and thickness of 3 cm is to be made from metal. What is the total amount of metal required (in cm3) to make the sphere? (Take π = \(\frac{22}{7}\))

The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius.

The radius of a sphere is half its diameter. So, to calculate the surface area of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume.