The length of the bridge, which a train 140 m long and traveling at 45 km/hr can cross in 30 sec is?  Choose the correct choice:  A) 377  B) 367  C) 235  D) 245  E) 267
Speed = 45 * 5/18 = 25/2 m/sec.   Time = 30 sec   Let the length of bridge be x meters.   Then, (140 + x)/30 = 25/2   x = 235 m.   Answer: 235
<result>C</result>
The length of the bridge, which a train 140 m long and traveling at 45 km/hr can cross in 30 sec is?