Student: A train 600 meters long is running with a speed of 50 kmph. The time taken by it to cross a tunnel 170 meters long is?
Options:
(A) 287 sec
(B) 288 sec
(C) 55 sec
(D) 16 sec
(E) 17 sec.
Another student: Let's say, hmmm...
D = 600 + 170 = 770
S = 50 * 5/18 = 14 mps
T = 770/14 = 55 se Final answer: (C).