The total surface area of a solid cube is 726 cm2. It is melted and recast into a solid cylinder of radius 11 cm. What is the height (in cm) of the cylinder? (take π = 227)

Find the approximate volume and surface area of a sphere of radius 6 cm. (Use π = 227)

Ram has two spherical balls of radius 10.5 cm each and Meena has six spherical balls of radius 7 cm each. What is the total volume of the balls that Meena has?