How many balls, each of radii 0.5 cm, can be made from a solid sphere of metal of radius 10 cm by melting it?
Find the cost(in rupee) of putting grass beds on a pathway having length and breadth of 40 m and 10 m resp at 2 paise per square m.
When C = 300 + 0.8Y and Y = 1,000, saving at zero income level will be