Concept:Track each movement using directions and find net displacement from start.
Explanation:Start at origin O.
1. 30 m South → position S1: (0, -30).
2. Turn right (now facing West), walk 30 m West → position ( -30, -30).
3. Turn left (now facing South), walk 20 m South → position ( -30, -50).
4. Turn left (now facing East), walk 30 m East → position (0, -50).
Net displacement: 50 m South from start.
Answer:50 metres south