Find the lateral surface area of a cylinder with radius 25 cm and height 7 cm. (Take π = 227, answer in cm2)

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?