In a constant head permeameter with cross-sectional-area of 10 cm2 when the flow was taking place under a hydraulic gradient of 0.5, the amount of water, collected in 90 second was 900 cc. The permeability of the soil is :
1
1.0 cm/s
2
2.0 cm/s
3
0.2 cm/s
4
1.5 cm/s
5
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