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) 176 m B) 189 m C) 245 m D) 189 m E) 197 m
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 m
<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?