The length of the bridge, which a train 120 meters long and travelling at 45 km/hr can cross in 30 seconds, is:	Options:
A) 230	B) 244	C) 245	D) 255	E) 236
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (120 + X)/30 = 25/2 ==&gt; 2(120 + X) = 750 ==&gt; X = 255 m.   Answer: Option 255
<result>D</result>
The length of the bridge, which a train 120 meters long and travelling at 45 km/hr can cross in 30 seconds, is: