A train 490 m long, running with a speed of 63 km/hr will pass a tree in?\nOptions:\n(A) 18 sec\n(B) 16 sec\n(C) 76 sec\n(D) 15 sec\n(E) 28 sec
Let's be accurate as possible and think first.
(E)
Speed = 63 * 5/18 = 35/2 m/sec\nTime taken = 490 * 2/35 = 28 sec.

The final answer: (E)