2 m

2 m to 3 m

3 m to 4 m

5 m

erosion of over burden

melting of ice sheets after glaciation

permanent rise of water table

all the above.

homogeneous

isotropic

incompressible

all the above.

be either straight or curved

pass through the origin of stress

intersect the shear stress axis

all the above.

100 years

120 years

140 years

160 years