4-3. Water is pumped at a rate of 33.42 ft³/min from an unconfined aquifer that is 75 ft deep. Wells located at 100 and 150 ft from the pumping well have drawdowns of 9 and 7 ft, respectively. What is the hydraulic conductivity of the soil? (Note: The FE Manual uses permeability rather than hydraulic conductivity.) a. 23 ft/d b. 615 ft/d c. 0.31 ft/d d. 140 ft/d

Fig: 1