Question : A mixture of 70 litres of wine and water contains 10% of water. How much water must be added to make the water $12 \frac{1}{2}\%$ of the resulting mixture?

Option 1: 5 litres

Option 2: 3 litres

Option 3: 2 litres

Option 4: 4 litres

Question : A 40-litre mixture of milk and water contains milk and water in the ratio of 7 : 3. How many litres of water should be added to the mixture so that the resulting mixture has 60% water in it?

Option 1: 30

Option 2: 35

Option 3: 20

Option 4: 25

Question : In a mixture of 178 litres, the ratio of water and milk is 5 : 7. How much water should be added to make the ratio of water and milk 3 : 4?

Option 1: $3 \frac{17}{24}$ litres

Option 2: $3 \frac{13}{24}$ litres

Option 3: $2\frac{11}{24}$ litres

Option 4: $2\frac{23}{24}$ litres

Question : A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4 : 5. The quantity of alcohol in the given mixture is:

Option 1: 3 litres

Option 2: 4 litres

Option 3: 15 litres

Option 4: 10 litres

Question : A 10-litre solution of milk and water contains 8 litres of milk. 2 litres of the solution is replaced by pure milk and mixed. The process is repeated two more times. How much milk (in litres) is present in the mixture so obtained?

Option 1: 8.976

Option 2: 8.597

Option 3: 8.796

Option 4: 8.679