The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds, is:	Select.
A) 249  B) 178  C) 245  D) 277  E) 121
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time   = 30 sec. Let the length of bridge be x meters. Then, (130 + X)/30 = 25/2   ==&gt; 2(130 + X) = 750   ==&gt; X   = 245 m   Answer: 245
<result>C</result>
The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds, is: