The length of the bridge, which a train 130 m long and traveling at 45 km/hr can cross in 30 sec is? Select:
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, (130 + x)/30 = 25/2   x = 245 m.   Answer: Option 245
<result>C</result>
The length of the bridge, which a train 130 m long and traveling at 45 km/hr can cross in 30 sec is?