The area of a rectangular field is 144 m2. If the length had been 6 m more, the area would have been 54 m2 more. What is the original length of the field?

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?