Question: If a city has a population of 1 million and each person generates 0.5 kg of waste per day, how much waste is generated by the city in a week?

Options:

1. 3.5 million kg
2. 2.5 million kg
3. 4 million kg
4. 3 million kg

Correct Answer: 3.5 million kg

Solution:

Total waste = Population * Waste per person per day * Days in a week = 1,000,000 * 0.5 * 7 = 3,500,000 kg.