A dye pack is placed into an observation well $1$ km from a $750$ mm diameter puming well. The pumping well has a steasy state discharge of $115$ L$/$s$.$ After $90$ days $,$ the dys is observed in the pumping well effluent stream. The aquifer porosity is estimated to be $0\mathrm{.}25.$ The pumping well fully penetrates the aqifer, and drawdown is small compared with the thickness. the average saturated aquifer thickness is most nearly? a$)0\mathrm{.}19$ m

b$)1\mathrm{.}1$ m

c$)2\mathrm{.}3$ m

d$)3\mathrm{.}7$ m