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) 266 B) 288 C) 245 D) 215 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>D</result>
The length of the bridge, which a train 160 meters long and travelling at 45 km/hr can cross in 30 seconds, is?