1) A 24 litre mixture contains water : milk in the ratio of 3 : 5.How much water must be added to this mixture to reverse this ratio? A) 20 litres B) 24 litres C) 18 litres D) 16 litres Answer: Option DExplanation:Initialy, water $=\frac{3}{8}\times 24=9 litres$ Milk $=24-9=15 litres$ Now let x litres of water be added to make the ratio 5 : 3 $\frac{9+x}{15}=\frac{5}{3}$ x=16 litres
