A permeability test was run on a compacted sample of dirty sandy gravel. The sample was 175 mm long and the diameter of the mold 175 mm. In 90 s the discharge under a constant head of 38 cm was 405 cm3. The sample had a dry mass of 4950 g and its ρ s was 2710 kg/m3. Calculate

(a) the coefficient of permeability

(b) the seepage velocity

(c) the discharge velocity during the test.?