The floor of a rectangular room has an area of 60 m2 and its perimeter is 34 metres. The length of the longest stick, in metres, which can be placed flat on the floor of this rectangular room is:

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?