D = 100 + 150 = 250
S = 36 * 5/18 = 10 mps
T = 250/10 = 25 se
How many seconds will a train 100 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?

(1) 22 sec
(2) 77 sec
(3) 25 sec
(4) 18 sec
(5) 17 sec