The length of the bridge, which a train 180 meters long and travelling at 45 km/hr can cross in 30 seconds, is?
Choose the correct choice from the following: A) 388 B) 167 C) 195 D) 288 E) 261
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (180 + X)/30 = 25/2 ==&gt; 2(180 + X) = 750 ==&gt; X = 195 m.   Answer: 195
<result>C</result>
The length of the bridge, which a train 180 meters long and travelling at 45 km/hr can cross in 30 seconds, is?