Answer:
relative density is 53.61 %
soil is medium
Explanation:
given data
maximum dry unit weight γd max = 122.5 lb/ft³
minimum dry unit weight γd min = 95.0 lb/ft³
Gs = 2.67
unit weight γd = 108 lb/ft³
solution
we get here relative density Dr that is express as
Dr = [tex]\frac{\gamma d(max)}{\gamma d} * \frac{\gamma d-\gamma d(min)}{\gamma d(max)-\gamma d(min)}[/tex] .................1
put here value and we get
Dr = [tex]\frac{122.5}{108} *\frac{108-95}{122.5-95}[/tex]
Dr = 0.5361 = 53.61 %
so soil is medium because it is in between 35 to 65 %
