a 600-g sample of the sand is removed from the stockpile and placed in a container which is then completely filled with water. the total weight of this assembly (i.e. container water sand) is 1750 g. the weight of the container filled with just water was 1450 g. calculate the moisture content of the sand in the stockpile (i.e. the amount of moisture which is in excess of the moisture needed to bring this aggregate to the ssd condition) knowing that its g ssd