Question

He length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is

Answer 1

Speed =45 x5m/sec=25m/sec.182

Time = 30 sec.

Let the length of bridge be x metres.

Then,130 + x=25302

 2(130 + x) = 750

 x = 245 m.