The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:	Pick:
A) 200 meters
B) 225 meters
C) 245 meters
D) 250 meters
E) 300 meters

Rationale: "given , length of the train = 130 meters speed of the train = 45 km / hr = 45 * 518 m / sec = 252 m / sec time = 30 secs let the length of the bridge be x meters . the distance travelled by the train while crossing the bridge will be sum of the length of train and length of the bridge = ( x + 130 ) meters so , 252 = x + 13030 = 30 * 25 = 2 x + 260 = 750 - 260 = 2 x = 490 = 2 x = x = 245 meters . answer c"
Answer: C