A train 200 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?
Options:
(A) 32
(B) 28
(C) 40
(D) 27
(E) 21 OK. Let's think. Some random thoughts first:
S = (200 + 300)/45 = 500/45 * 18/5 = 40 The answer: (C).