The length of the bridge, which a train 150 metres long and travelling at 45 km/hr can cross in 30 seconds, is?	Choose one.
A) 76 m
B) 178 m
C) 225 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, (150 + x)/30 = 25/2   =&gt; 2(150 + x)= 750 =&gt; x = 225 m.   Answer: 225 m
<result>C</result>
The length of the bridge, which a train 150 metres long and travelling at 45 km/hr can cross in 30 seconds, is?