The length of the bridge, which a train 120 metres long and travelling at 45 km/hr can cross in 30 seconds, is?
Answers:
A) 255  B) 267  C) 255  D) 277  E) 211
Speed = [45 X 5/18] m/sec = [25/2] m/sec   Time = 30 sec   Let the length of bridge be x metres.   Then, (120 + x)/30 = 25/2   =&gt; x = 255 m. Answer:255
<result>C</result>
The length of the bridge, which a train 120 metres long and travelling at 45 km/hr can cross in 30 seconds, is?