A train 120 meters long takes 6 seconds to cross a man walking at 5 kmph in the direction opposite to that of the train. Find the speed of the train. Choose the correct option
A) 67 kmph  B) 50 kmph  C) 55 kmph  D) 60 kmph  E) 70 kmph
Explanation:   Let the speed of the train be x kmph.   Speed of the train relative to man = (x + 5) kmph = (x + 5) ×5/18 m/sec.   Therefore 120/((x+5)×5/18)=6 &lt;=&gt; 30 (x + 5) = 2160 &lt;=&gt; x = 67   Speed of the train is 67 kmph.   67 kmphnswer: Option 67 kmph
<result>A</result>
A train 120 meters long takes 6 seconds to cross a man walking at 5 kmph in the direction opposite to that of the train. Find the speed of the train.