The lateral surface area of a cube is 676 cm2. If the side of this cube is 4 cm more than the height of a cylinder whose volume is 972 cm3, find the curved surface area of the cylinder (use π = 3).

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?