A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Formula for converting from km/hr to m/s: X km/hr =[X x5/18] m/s.
Therefore, Speed =[45 x 5/18]m/sec= 25/2m/sec.
Total distance to be covered = (360 + 140) m = 500 m.
Formula for finding Time =
Required time = [500 x 2/25]sec = 40 sec