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An undisturbed soil at a borrow pit has a water content 12 per Cent, void ratio 0.55 and specific gravity of solids 2.62. The soil from the borrow pit is to be used for the construction of an embankment. The specifications for the embankment require a dry density of 17.5 kN/m3 with a water content of 18-5 per cent. Calculate the quantity of water in litres which is required to be added to the borrow pit soil per m3 of finished embankment.