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A bed of sand consists of three horizontal layers of equal thickness. The value of Darcy's k for the upper and lower layers is 1 x 10-2 cm/sec and that for

the middle layer is 1 x 10-1 cm/sec. The ratio of the permeability of the bed in the horizontal direction to that in the vertical direction is

A. 10.0 to 1
B. 2.8 to 1
C. 2.0 to 1
D. 1 to 10


B. 2.8 to 1 .....................................
0 0 0
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