According to Terzaghi and peck, the ratio of D15 size of filter material to the D85 size of the base material should be:

According to Terzaghi and peck, the ratio of D15 size of filter materi

1.	According to Terzaghi and peck, the ratio of D15 size of filter material to the D85 size of the base material should be:
A.	< 10
B.	< 4
C.	< 25
D.	< 15
Answer» C. < 25

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According to Terzaghi and peck, the ratio of D15 size of filter material to the D85 size of the base material should be:

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