The length of the bridge, which a train 155 metres long and travelling at 45 km/hr can cross in 30 seconds, is?	Pick one
A) 76 m  B) 178 m  C) 220 m  D) 187 m  E) 176 m
Speed = [45 X 5/18] m/sec   = [25/2] m/sec Time = 30 sec Let the length of bridge be x metres. Then, (155 + x)/30 = 25/2   =&gt; 2(155+ x)= 750 =&gt; x = 220 m.   Answer: 220 m
<result>C</result>
The length of the bridge, which a train 155 metres long and travelling at 45 km/hr can cross in 30 seconds, is?