The length of the bridge, which a train 140 m long and traveling at 45 km/hr can cross in 30 sec is?	Choose the correct choice from the following options:  A) 235  B) 240  C) 245  D) 250  E) 255

Rationale: "speed = 45 * 5 / 18 = 25 / 2 m / sec . time = 30 sec let the length of bridge be x meters . then , ( 140 + x ) / 30 = 25 / 2 x = 235 m . answer : option a"
Answer: A