Q6. A 2-m high sandy fill material was placed loosely at a relative density of 47%. Laboratory studies indicated that the maximum and minimum void ratios of the fill material are 0.92 and 0.53, respectively. Construction specification required that the fill be compacted to a relative density of 80%. If specific gravity of fill material is 2.65, determine (i) dry unit weight of the fill before and after compaction, and (ii) final height of the fill after compaction.