A tubewell of 20 cm diameter penetrates fully an artesian aquifer having thickness of 3000 cm, How much volume of water can be extracted in a day from this aquifer if pumping is done at a constant rate.

Assume drawdown during pumping to be 2.5 m at well face, Radius of Influence (R) is 250 m and Permeability of the aquifer to be 5 x 10^-4 m/sec.