The length of the bridge, which a train 120 m long and traveling at 45 km/hr can cross in 30 sec is?
Choose the correct option
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, (120 + x)/30 = 25/2   x = 255 m.   Answer: Option 255
<result>E</result>
The length of the bridge, which a train 120 m long and traveling at 45 km/hr can cross in 30 sec is?