The molar conductivity of 0.05 M of solution of an electrolyte is 200 ${\mathrm{\Omega }}^{-1}\hspace{0.17em}{\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$. The resistance offered by a conductivity cell with cell constant (1/3) ${\mathrm{cm}}^{-1}$ would be about