A stratum of soil consists of three layers of equal thickness. The per – McqOptions

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1.	A stratum of soil consists of three layers of equal thickness. The permeability of both the top and the bottom layers is 10-4 cm/s and that od middle layer is 10-3 cm/s ; then the value of the horizontal coefficient of permeability for the entire composite of the soil layers is
A.	2 × 10-4 cm/s
B.	3 × 10-4 cm/s
C.	4 × 10-4 cm/s
D.	5 × 10-4cm/s
Answer» D. 5 × 10-4cm/s

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