When the surcharge angle reduces to zero, the coefficient of active ea – McqOptions

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1.	When the surcharge angle reduces to zero, the coefficient of active earth pressure is given by
A.	K<sub>a</sub>=1
B.	(K_a= frac{1-sin }{1+sin } )
C.	(K_a= frac{1+sin }{1-sin } )
D.	K<sub>a</sub>=0
Answer» C. (K_a= frac{1+sin }{1-sin } )

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