The total surface area of a solid right circular cylinder is 462 cm2. If its curved surface area is one-third of its total surface area, then the radius and height of the cylinder are respectively (in cm) (Use 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?