A train 150 meters long is tracking at 54 km/h. How long will it take to pass a stationary pedestrian? MCQ with Answer and Explanation

Explanation:
Speed of train = 120 / 6 = 20 m/s. Total distance to pass platform = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.

Explanation:
Let total distance be 100 km. First part: 40 km at 40 km/h => time = 1 hour. Remaining distance = 60 km. Second part: 50% of 60 = 30 km at 30 km/h => time = 1 hour. Remaining distance = 30 km. Third part: 30 km at 15 km/h => time = 2 hours. Total time = 1 + 1 + 2 = 4 hours. Average speed = 100 / 4 = 25 km/h.

Explanation:
Total distance = 150 + 300 = 450 meters. Speed = 45 * (5/18) = 12.5 m/s. Time taken = 450 / 12.5 = 36 seconds.