On decreasing the length and breadth of a rectangle by 20% and 25% respectively, the area of the rectangle decreases by 200 cm2. Find the area of the original rectangle.

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?