If top of earth retained is horizontal, the coefficient of passive earth pressure for retaining wall become:

\(\frac{{\sin \left( \phi \right)}\ -\ 1}{{\sin \left( \phi \right)}\ +\ 1} \)

\(\frac{{1 - \sin \left( \phi \right)}}{{1 + \sin \left( \phi \right)}} \)

\( \frac{{1 + \sin \left( \phi \right)}}{{1 - \sin \left( \phi \right)}}\)

\(\frac{{\sin \left( \phi \right)}\ +\ 1}{{\sin \left( \phi \right)}\ -\ 1} \)

If top of earth retained is horizontal, the coefficient of passive ear

1.	If top of earth retained is horizontal, the coefficient of passive earth pressure for retaining wall become:
A.	\(\frac{{1 - \sin \left( \phi \right)}}{{1 + \sin \left( \phi \right)}} \)
B.	\( \frac{{1 + \sin \left( \phi \right)}}{{1 - \sin \left( \phi \right)}}\)
C.	\(\frac{{\sin \left( \phi \right)}\ -\ 1}{{\sin \left( \phi \right)}\ +\ 1} \)
D.	\(\frac{{\sin \left( \phi \right)}\ +\ 1}{{\sin \left( \phi \right)}\ -\ 1} \)
Answer» C. \(\frac{{\sin \left( \phi \right)}\ -\ 1}{{\sin \left( \phi \right)}\ +\ 1} \)

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If top of earth retained is horizontal, the coefficient of passive earth pressure for retaining wall become:

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