A sample of water from a large swimming pool has resistance of ${10}^4$ ohm at 25°C when placed in a conductivity cell. When filled with 0.02 M KCl solution the cell has resistance of 100 ohm at 25°C. An amount of 585 g of NaCl was dissolved in the pool which was thoroughly stirred. A sample of this solution gave a resistance of 8000 ohm. Molar conductivity of NaCl at this concentration is $125 oh{m}^{-1}.c{m}^2.mo{l}^{-1}$ and molar conductivity of 0.02 M KCl is $200 oh{m}^{-1}.c{m}^2.mo{l}^{-1}$. Find volume of water in pool in $m^3$.