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A sample of water from a large swimming pool has a resistance of \( 10000 \Omega \) at \( 25^{\circ} \mathrm{C} \) when placed in a certain conductance cell. When filled with \( 0.02 \mathrm{M} \mathrm{KCl} \) solution, the cell has a resistance of \( 100 \Omega \) at
\( \mathrm{P} \) \( 25^{\circ} \mathrm{C} \). 585 gm of \( \mathrm{NaCl} \) were dissolved in the pool, which was throughly stirred. A sample of this solution gave a resistance of \( 8000 \Omega \). [Given : Molar conductance of \( \mathrm{NaCl} \) at that concentration is \( 125 \Omega^{-1} \mathrm{~cm}^{2} \)
W \( \mathrm{mol}^{-1} \) and molar conductivity of \( \mathrm{KCl} \) at \( 0.02 \mathrm{M} \) is \( 200 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1} \).] Volume (in Litres) of water in the pool is:
(A) \( 1.25 \times 10^{5} \)
(B) 1250
(C) 12500
(D) None of these
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