Question: A mixture of two liquids X and Y is in the ratio 1:4. If 10 liters of liquid Y is added, what will be the new ratio if the original mixture was 20 liters?

Options:

1. 1:5
2. 1:4
3. 1:3
4. 1:2

Correct Answer: 1:5

Solution:

Original mixture = 20 liters (X = 4, Y = 16). After adding 10 liters of Y, new Y = 26. New ratio = 4:26 = 1:5.