$2-$ Discharge from a fully penetrated well with diameter of $20cm$ into an unconfined aquifer

with thickness of $30m$ is measured as $0\mathrm{.}1\frac{m^3}{s}.$ The drawdown measured in two observation

wells with radial distance of $20m$ and $50m$ are $4\mathrm{.}0m$ and $2\mathrm{.}5m$ respectively. Determine

the hydraulic conductivity and the drawdown in the pumping well.