How many cubes,each of surface area $24\, cm^{2}$,can be made out of a cube of edge measure $1\, m$?

The sum of the radius of the base and the height of a solid cylinder is $37\, m$. If the total surface area of the solid cylinder is $1628\, m^2$,then the circumference of its base and the volume of the cylinder are:

The radius of the cylinder is made twice as large. How should the height be changed so that the volume remains the same?

How many coins,$2 \, mm$ thick and $1.5 \, cm$ in diameter,should be melted in order to form a right circular cylinder with base diameter $6 \, cm$ and height $8 \, cm$?

If the radius of a sphere is doubled,then its volume is increased by (in $\%$)

Three solid spheres have their radii $r_{1}, r_{2}$ and $r_{3}$. The spheres are melted to form a single solid sphere of a bigger radius. The radius of the new sphere is: