D = 100 + 170 = 270
S = 36 * 5/18 = 10 mps
T = 270/10 = 27 sec
How many seconds will a train 100 meters long take to cross a bridge 170 meters long if the speed of the train is 36 kmph?
A. 54 sec
B. 65 sec
C. 25 sec
D. 45 sec
E. 27 sec