The radius of the base of a solid right circular cylinder is 8 cm and its total surface area is 272π cm2. The volume (in cm3) of the cylinder is:

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?