A train 350 m long, running with a speed of 63 km/hr will pass a tree in?\nOptions:\n(A) 15 sec\n(B) 16 sec\n(C) 18 sec\n(D) 20 sec\n(E) 25 sec
Let’s work this out in a step by step way to be sure we have the right answer.
(D)
Speed = 63 * 5/18 = 35/2 m/sec\nTime taken = 350 * 2/35 = 20 sec.

The answer: (D)