A 180 meter long train crosses a man standing on the platform in 9 sec. What is the speed of the train?
Options:
(A) 72
(B) 108
(C) 1266
(D) 188
(E) 211 Hmmm, my stream of consciousness:
S = 180/9 * 18/5 = 72 kmph So, the answer is (A).