The length of the bridge, which a train 140 metres long and travelling at 45 km/hr can cross in 30 seconds, is?  Choose the correct choice from the following choices
A) 255
B) 267
C) 235
D) 277
E) 211
Speed = [45 X 5/18] m/sec = [25/2] m/sec Time = 30 sec Let the length of bridge be x metres. Then, (140 + x)/30 = 25/2 =&gt; 2(140 + x) = 750 =&gt; x = 235 m.   Answer:235
<result>C</result>
The length of the bridge, which a train 140 metres long and travelling at 45 km/hr can cross in 30 seconds, is?