D = 90 * 5/18 * 5 = 125 mis the reasoning for what question and answer pair?
Q: If a train, travelling at a speed of 90 kmph, crosses a pole in 5 sec, then the length of train is?
Options:
(A) 288
(B) 125
(C) 88
(D) 76
(E) 232
A: (B)