The angle of internal friction of clays, is usually – McqOptions

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1.	The angle of internal friction of clays, is usually
A.	0¬∞ to 5¬∞
B.	5¬∞ to 20¬∞
C.	20¬∞ to 30¬∞
D.	30¬∞ to 45¬∞
Answer» C. 20¬∞ to 30¬∞

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