The volume of a cylinder is 4,312 cm3. Its curved surface area is one-third of its total surface area. What is its curved surface area (in cm2)? (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?