Volume of the Solution:
To calculate the volume of the solution, we simply add the volumes of alcohol and water together. In this case, we have 150 ml of alcohol and 600 ml of water, so the total volume of the solution is:

150 ml + 600 ml = 750 ml

Therefore, the volume of the solution is 750 ml.

Percentage of the Solution:
To calculate the percentage of the solution, we need to determine the amount of alcohol as a percentage of the total volume. We can use the formula:

Percentage = (Alcohol Volume / Total Volume) * 100

Substituting the values we have, we get:

Percentage = (150 ml / 750 ml) * 100 = 20%

Therefore, the solution is a 20% alcohol solution.

Explanation:
The solution is prepared by mixing 150 ml of alcohol with 600 ml of water. This means that the total volume of the solution is the sum of the volumes of alcohol and water, which is 150 ml + 600 ml = 750 ml.

To calculate the percentage of the solution, we need to determine the amount of alcohol as a percentage of the total volume. In this case, the alcohol volume is 150 ml, and the total volume is 750 ml. Using the formula for calculating percentages, we divide the alcohol volume by the total volume and multiply by 100. This gives us a percentage of 20%, indicating that the solution is 20% alcohol.

In summary, a solution of alcohol in water has been prepared by mixing 150 ml of alcohol with 600 ml of water. The total volume of the solution is 750 ml, and the percentage of the solution is 20%.