What time (in seconds) is required for a 398 m long train to cross a 802 m long tunnel, if the train travels at a speed of 45 km/h?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 96 .
Length of train = 398 m
Length of tunnel = 802 m
Total distance to cover = 398 + 802 = 1200 m
Speed = 45 km/h = 45 × 5/18 = 12.5 m/s
Time = Distance ÷ Speed = 1200 ÷ 12.5 = 96 seconds