Four cubes, each of side 8 cm, are placed together end-to-end in a row. What is the total surface area (in cm2) of the solid cuboid so formed?

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?