D = 100 + 250 = 350
S = 36 * 5/18 = 10 mps
T = 350/10 = 35 sec
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?

A. 54 sec
B. 35 sec
C. 25 sec
D. 45 sec
E. 24 sec