Student: A train 520 meters long is running with a speed of 34 kmph. The time taken by it to cross a tunnel 280 meters long is?
Options:
(A) 287 sec
(B) 89 sec
(C) 48 sec
(D) 16 sec
(E) 17 sec.
Another student: Let's say, hmmm...
D = 580 + 280 = 800
S = 34 * 5/18 = 9 mps
T = 800/9 = 89 sec Final answer: (B).