Question: A mixture of two types of fruit juice is in the ratio 1:2. If the total volume of the mixture is 90 liters, how much of the first type of juice is there?

Options:

1. 30 liters
2. 45 liters
3. 60 liters
4. 15 liters

Correct Answer: 30 liters

Solution:

Total parts = 1 + 2 = 3. First type of juice = (1/3) * 90 = 30 liters.