A train 140 m long passes a man,running at 6 kmph in the direction opposite to that of the train,in 6 seconds.The speed of the train is	Select
A) 54 kmph
B) 60 kmph
C) 66 kmph
D) 72 kmph
E) 78 kmph

Rationale: "speed of train relative to man : 140 / 6 * 18 / 5 km / hr = 84 km / hr let speed of train = x therefore x + 6 = 84 x = 84 - 6 x = 78 km / hr answer : e"
Answer: E