A train completely crosses a bridge of length 80 m in 15 s. Find the length of the train if its speed is 72 km/h.
Answer & explanation
Correct answer: option 2
Speed of train = 72 km/h = 20 m/sec
Distance = Speed × Time
Total Distance covered by it in 15 seconds = 20 × 15 = 300 m
Total distance covered = Length of train + Length of platfor
So , Length of bridge = 300 - 80 = 220 m