Use some thinking to answer the following question. A train 420 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 36 sec
(B) 16 sec
(C) 17 sec
(D) 88 sec
(E) 12 sec
Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 420 * 2/35 = 36 sec So the final answer is (A).