A train running at the speed of 60 km/hr crosses a pole in 21 sec. What is the length of the train?
Options:
(A) 350
(B) 150
(C) 277
(D) 258
(E) 191 Hmmm, my stream of consciousness:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 21 = 350 m So, the answer is (A).