A train 100 meters long takes 3 seconds to pass a man walking at 5 km/h in the same direction. What is the speed of the train?
Q1. A train 100 meters long takes 3 seconds to pass a man walking at 5 km/h in the same direction. What is the speed of the train?
Answer: 125 km/h
Explanation: Relative speed = (length of train) / (time taken) = 100 / 3 m/s = (100 / 3) * (18 / 5) km/h = 120 km/h. Since the man is walking at 5 km/h, the train's speed = 120 + 5 = 125 km/h.