Answer :
Final answer:
To make 450ml of salad dressing with a 1:2 vinegar to oil ratio, Ollie uses 300ml of oil.
Explanation:
Ollie is making a salad dressing using a mixture of 1 part vinegar to 2 parts oil. Since he makes 450ml of salad dressing in total, we need to calculate the amount of oil used in this mixture.
To find out how many parts the entire mixture contains, we add the parts of vinegar and oil together: 1 part vinegar + 2 parts oil = 3 parts.
Now that we know the total parts of the mixture are 3, we find out what 1 part represents in milliliters by dividing the total volume of the mixture by the total number of parts:
- 450ml ÷ 3 parts = 150ml per part.
Since the oil part is 2 parts of the mixture, we calculate the amount of oil as:
- 150ml × 2 = 300ml of oil.
Therefore, Ollie uses 300 milliliters of oil to make 450 milliliters of salad dressing.
