201. A railway train 100 meters long is running at the speed of 30 km/h. How long will it take to pass an 80 meters long bridge?
- A. 21.6 sec
- B. 12.6 sec
- C. None of these
- D. 17.6 sec
Check answer and explanation
Answer: 21.6 sec
Explanation To find the time taken, first, calculate the total distance the train needs to cover: Total distance = Length of train + Length of bridge = 100 m + 80 m = 180 m Convert the speed from km/h to m/s: 30 km/h = 30 × (1000 m / 3600 s) = 30 × 5/18 = 8.33 m/s Time taken = Distance / Speed = 180 m / 8.33 m/s = 21.6 seconds