In what time will a railway train 40 m long moving at the rate of 36 kmph pass a telegraph post on its way?
Options:
(A) 3
(B) 5
(C) 9
(D) 4
(E) 7 Stream of consciousness first, then make a decision:
T = 40/36 * 18/5 = 4 sec
Thus, the answer is (D).