(a) e = n/1-n = 0.3/1-0.3 = 0.43
Bulk density ? = Gspw(1+w)/1+e = 2.7x1000(1+0.1)/1+0.43 = 2079.0 kg/m3

(b) Saturated density psat= GsPw+epw / 1+e = 2.7x1000+0.43x1000/1+0.43 = 21