A stratum of clay 2 m thick will get consolidated 80% in 10 years. For the 80% consolidation of 8 m thick stratum of the same clay, the time required is

A stratum of clay 2 m thick will get consolidated 80% in 10 years. For

1.	A stratum of clay 2 m thick will get consolidated 80% in 10 years. For the 80% consolidation of 8 m thick stratum of the same clay, the time required is
A.	100 years
B.	120 years
C.	140 years
D.	160 years
E.	180 years.
Answer» E. 180 years.