The length of the bridge, which a train 110 meters long and travelling at 45 km/hr can cross in 30 seconds, is? Choose the correct choice from the following answers:
A) 265
B) 288
C) 245
D) 776
E) 232

Rationale: speed = ( 45 * 5 / 18 ) m / sec = ( 25 / 2 ) m / sec . time = 30 sec . let the length of bridge be x meters . then , ( 110 + x ) / 30 = 25 / 2 = = > 2 ( 110 + x ) = 750 = = > x = 265 m . answer : a
Answer: A