A tank in the shape of a hemisphere is filled with water. The water is then transferred to a cylindrical container with the same radius and height equal to the radius. What fraction of the cylinder is filled?

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?