The length of the bridge, which a train 145 m long and traveling at 45 km/hr can cross in 30 sec is?  Answers.
A) 230  B) 240  C) 245  D) 250  E) 255
Speed = 45 * 5/18 = 25/2 m/sec.   Time = 30 sec   Let the length of bridge be x meters.   Then, (145 + x)/30 = 25/2   x = 230 m.   230nswer: Option 230
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The length of the bridge, which a train 145 m long and traveling at 45 km/hr can cross in 30 sec is?