The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds, is?  Choose the correct choice.
A) 288 B) 266 C) 245 D) 277 E) 211

Rationale: speed = ( 45 * 5 / 18 ) m / sec = ( 25 / 2 ) m / sec . time = 30 sec . let the length of bridge be x meters . then , ( 130 + x ) / 30 = 25 / 2 = = > 2 ( 130 + x ) = 750 = = > x = 245 m . answer : c
Answer: C