Question: If 2 kg of sugar costs $5, how much will 5 kg of sugar cost?

Options:

1. $10
2. $12.5
3. $15
4. $20

Correct Answer: $12.5

Solution:

Cost per kg = $5 / 2 kg = $2.5. For 5 kg, cost = 5 * 2.5 = $12.5.