Question $4$

$($a$)$ Two well $250mm$ diameter each are located at $500m$ from each other in a confined aquifer. They are pumped at the same rate of $1500\frac{m^3}{s}.$ If the drop in pressure $($drawdown$)$ at both wells is $10m,$ and the coefficient of hydraulic conductivity is $0\mathrm{.}001\frac{m}{?}$ day, calculate the Radius of Influence of the well.

$($b$)$ Calculate the distance at which maximum drawdown is recorded when pumping is being carried out in both wells simultaneously.