Some question: A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?
Options:
(A) 4 min
(B) 8 min
(C) 9 min
(D) 6 min
(E) 1 min
Some stream of consciousness:
S = 600/40 = 15 mps
S = 3600/15 = 240 sec = 4 min The answer: (A).