The base of a prism is a right-angled triangle whose sides are 9 cm, 12 cm, and 15 cm. If the volume of this prism is 648 cm3, what will be the height of the prism?

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?