Volume and Surface Area - General Questions

A solid metal sphere of radius 8 cm is melted and recast into small spheres of radius 1 cm. How many small spheres are obtained?

Find the volume of a cylinder of radius 7 cm and height 16 cm. (π = 22/7)

How many cubes of edge 2 cm can be cut from a cube of edge 12 cm?

What is the volume of a cube of edge 15 cm?

How many cubes of edge 1 cm can be cut from a cube of edge 9 cm?