How long does a train 90 metres long running at the speed of 71 km/hr take to cross a bridge 132 metres in length?
Answer: B
Speed = (71 x 5/18) m/sec = 19.72 m/sec
Total distance covered = (90 + 132) m = 222 m.
Required time = (222/19.72) sec = 11.26 sec