A 600 meter long train crosses a signal post in 30 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?\nOptions:\n(A) 4 min\n(B) 2 min\n(C) 8 min\n(D) 3 min\n(E) 5 min Stream of consciousness first, then make a decision:
User
S = 600/30 = 20 mps\nS = 3600/20 = 180 sec = 4 min
Thus, the answer is (D).
Assistant