The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
Pick one:
A) 10m B) 245m C) 25m D) 18m E) 12m
Explanation:   Speed = [45 X 5/18] m/sec = [25/2] m/sec Time = 30 sec Let the length of bridge be x metres. Then, (130 + x)/30 = 25/2 =&gt; 2(130 + x) = 750 =&gt; x = 245 m.   Answer: 245m) 245m
<result>B</result>
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is: