The length of the bridge, which a train 125 m long and traveling at 45 km/hr can cross in 30 sec is?	Choose the correct answer.
A) 235 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, (125 + x)/30 = 25/2   x = 250 m.   Answer: Option 250
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The length of the bridge, which a train 125 m long and traveling at 45 km/hr can cross in 30 sec is?