1.

The coefficient of permeability of the two soil layers 1 and 2 in soil deposit is 9*10-7 cm/s and 4*10-7 cm/s respectively. The thickness of the layers is equal. The value of average permeability parallel to bedding planes is ________

A. 4.5*10<sup>-7</sup> cm/s
B. 5.5*10<sup>-7</sup> cm/s
C. 6.5*10<sup>-7</sup> cm/s
D. 7.5*10<sup>-7</sup> cm/s
Answer» D. 7.5*10<sup>-7</sup> cm/s


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