Speed = 45 * 5/18 = 25/2 m/sec
Total distance covered = 210 + 140 = 350 m
Required time = 350 * 2/25 = 28 sec
A train 210 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?

  * 40 sec
  * 50 sec
  * 44 sec
  * 49 sec
  * 28 sec