A permeability test was run on a compacted sample of dirty sandy gravel. The sample was 150 mm long and the diameter of the mold 150 mm. In 83 s the discharge under a constant head of 40 cm was to7 em3 The sample had a dry mass of 51(10 g and its ts was 2680 kg/ms. Calculate
(a) the coefficient of permeability,
(b) the seepage velocity and
(c.) the discharge velocity during the test.