Question

On a plane at some distance from its base a mountain is found to have an elevation of 60°.At a station lying 900√3 further away from the mountain,the angle is reduced to 30°.Find the height of the mountain.​

Answer 1

A soil sample tested in a triaxial compression apparatus failed when the total maximum and minimum principal stresses were 100 kpa and 40 kpa, respectively. The pore pressure measured at failure was 10 kpa. The effective principal stress ratio at failure is