The length of the bridge, which a train 130 m long and traveling at 45 km/hr can cross in 30 sec is?
Pick:
A) 187 m
B) 279 m
C) 245 m
D) 279 m
E) 222 m
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: 245 m
<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?