UPSC Civil Service Exam Questions - Civil Engineering Questions and Answers

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A soil deposit has three layers having same thickness each but the permeabilities of the layers are in the ratio of 1 : 2 : 4 from top to bottom. What is the ratio of average permeability in the horizontal direction to that in the vertical direction ?

7 : 2

14 : 6

28 : 24

49 : 36

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