Question: A mixture of two types of oil is made in the ratio 1:3. If the total volume of the mixture is 40 liters, how much of the first type of oil is used?
Options:
Correct Answer: 10 liters
Solution:
In a 1:3 ratio, the total parts = 1 + 3 = 4. First type of oil = (1/4) * 40 = 10 liters.
