Average Speed = Total Distance ÷ Total Time.
• Time for first leg = 200 km ÷ 100 km/h = 2 h
• Time for second leg = 180 km ÷ 60 km/h = 3 h
• Total distance = 200 + 180 = 380 km
• Total time = 2 + 3 = 5 h
• Average speed = 380 km ÷ 5 h = 76 km/h
Final Answer: 76 km/h