If 3 people can paint a fence in 4 hours, how long would it take 6 people to paint the same fence, assuming they work at the same constant rate?

✓ Correct Answer: Option B

The total work required is constant: 3 people * 4 hours = 12 person-hours. If 6 people work, the time taken would be 12 person-hours / 6 people = 2 hours, assuming an inverse relationship between the number of people and time.