A conical tent of canvas is to be made whose radius of the base is 14 m and its height is 48 m. How many metres of canvas will be required, if the width of the canvas is 8 m?

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?