The curved surface area of a cylinder is 55.44 m2, which is two-thirds of its total surface area. Find the volume of the cylinder correct to two decimal places (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?