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The coefficient of permeability can be determined through a Falling Head Permeability Test conducted on a soil specimen with a cross-sectional area of 50cm and a height of 10cm. During this test, the water level in the standpipe, which has a diameter of 0.4 cm, decreases from 100 cm to 50 cm over a duration of half an hour.
Determine the seepage velocity if void ratio is 0.52.