The area of a square field is 256 m2 and a rectangular lawn, whose width is 58 of the side of the square field, has the same perimeter as that of the square field. What is the area (in m2) of the rectangular lawn?

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?