How many seconds will a train 100 meters long take to cross a bridge 250 meters long if the speed of the train is 36 kmph?  Choose the correct choice from the following answers.
A) 54 sec	B) 35 sec	C) 25 sec	D) 45 sec	E) 24 sec

Rationale: "d = 100 + 250 = 350 s = 36 * 5 / 18 = 10 mps t = 350 / 10 = 35 sec answer : b"
Answer: B