The length of a bridge in meters, which a train 100-meters long and traveling at 45 km/hr can cross in 30 seconds is? Choose the correct answer:
A) 225
B) 245
C) 275
D) 325
E) 375

Rationale: "45 km / h = 45000 m / 3600 s = 12.5 m / s in 30 seconds , the train can go 30 ( 12.5 ) = 375 meters let x be the length of the bridge . x + 100 = 375 meters x = 275 meters the answer is c ."
Answer: C