Let’s break this down step-by-step:
1. The Relative Positions:
We are given that:
- Only two persons are lighter than Rahul.
- Therefore, Rahul is the 4th heaviest in the lineup, with three people heavier than him.
2. Finding the People Heavier Than Rahul:
Since only two persons are lighter than Rahul, it follows that three people are heavier than him. This makes Rahul the 4th heaviest in the lineup, leaving the top three spots for those who are heavier.
3. Answer:
Hence, the number of people heavier than Rahul is \(\boxed{3}\).