2.10. For a well permeameter test in the field, it took 1.2 ft³/hr to maintain a height (hw) of 3.5 ft in the well. The radius of the well (rw) is 0.2 ft, and the thickness of the unsaturated strata between the water level in the well and the groundwater table (T) is 4.5 ft. Determine the permeability of soils around the well if the test was conducted at 20°C.