#Question

A $30$ cm diameter well completely penetrates an unconfined aquifer of saturated depth

$40$ m $.$ After a long period of pumping at a steady rate of $1500$ liter per minutes, the

drawdowns in two observation wells $25$ m and $75$ m from the pumping well were

found to be $3\mathrm{.}5$ m and $2\mathrm{.}0$ m respectively. $(1)$ Calculate the transmissibility of the

aquifer and $(2)$ Find the drawdown at the pumping well.