How long does a train 180 meters long running at the rate of 54 kmph take to cross a bridge 660 meters in length?	Choose the correct choice.
A) 33
B) 56
C) 55
D) 82
E) 62

Rationale: "explanation : t = ( 660 + 180 ) / 54 * 18 / 5 t = 56 answer : option b"
Answer: B