A gift box of cuboidal shape has to be covered by paper which costs ₹ 0.50 per square centimetre. If the box has dimensions 8 cm × 3 cm × 5 cm, then the cost of the paper will be:

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?