A train of length 342 m is running at 54 km/hr. In how much time (in seconds) will it cross a bridge of length 438 m?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 52
Length of the train = 342 m
Speed of the train = 54 km/hr = 54 x 1000/3600 = 15 m/s
Length of the bridge = 438 m
Hence,
Total time to cross the bridge = (438 + 342)/15 = 52 seconds