The length of the bridge, which a train 160 meters long and travelling at 45 km/hr can cross in 30 seconds, is: Pick one: A) 239 B) 277 C) 215 D) 88 E) 232
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (160 + X)/30   = 25/2 ==&gt; 2(160 + X) = 750 ==&gt; X = 215 m.   Answer: 215
<result>C</result>
The length of the bridge, which a train 160 meters long and travelling at 45 km/hr can cross in 30 seconds, is: