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1. |
The active earth pressure of a soil is proportional to (where φ is the angle of friction of the soil) |
A. | tan (45° - φ) |
B. | tan2 (45° + φ/2) |
C. | tan2 (45° - φ/2) |
D. | tan (45° + φ) |
Answer» D. tan (45¬∞ + œÜ) | |