Soil at a site consists of two layers. The top layer has permeability k units and bottom layer has permeability 5k units. If the thickness of both the layers is equal, then what is the average permeability in the vertical direction ?

Soil at a site consists of two layers. The top layer has permeability

1.	Soil at a site consists of two layers. The top layer has permeability k units and bottom layer has permeability 5k units. If the thickness of both the layers is equal, then what is the average permeability in the vertical direction ?
A.	3k units
B.	(5/3)k units
C.	(6/5)k units
D.	(5/6)k units
Answer» C. (6/5)k units

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Soil at a site consists of two layers. The top layer has permeability k units and bottom layer has permeability 5k units. If the thickness of both the layers is equal, then what is the average permeability in the vertical direction ?

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