$6\mathrm{.}10$ The maximum dry unit weight determined in the laboratory for a quartz sand is $16\mathrm{.}0k\frac{N}{m^3}.$ In the field, if the relative compaction is $90\%,$ determine the hydraulic conductivity of the sand in the field compaction condition $($given that $k$ for the sand at the maximum dry unit weight condition is $0\mathrm{.}03c\frac{m}{s}$ and $G_s=2\mathrm{.}7).$ Use Eq$.(6\mathrm{.}29).$