The contestants in The Apprentice were asked to create a specially flavoured beer. For this they have to add fruit juice concentrate to a barrel of beer. The concentrate has 36 g of sugar per 100 cm3. The contestants were told that the special beer had to have 5.68 g of sugar per pint (568 cm3), otherwise they would be fired. What volume of fruit juice concentrate do they need to use to prepare one barrel (162 dm3) of flavoured beer? 4.5 dm3