A passenger sitting near the window in a train moving at 50 km/h, noticed that it took 3 sec. for the oncoming train to pass by. What was the speed of the oncoming train if the length of the oncoming train was 75 metres?
Choose the correct choice from the following.
A) a)50km/h B) b)52km/h C) c)56km/h D) d)60km/h E) e)40km/h
im getting A   3 secs to pass a 75 mts train , therefore speed = 25 meters/sec   to convert m/s to km/hrs multiply by 3.6   25*3.6= 
<gadget id="calculator">25*3.6</gadget>
<output>90</output>
90   so its  90-50= 
<gadget id="calculator"> 90-50</gadget>
<output>40</output>
40 .   e)40km/h
<result>E</result>
A passenger sitting near the window in a train moving at 50 km/h, noticed that it took 3 sec. for the oncoming train to pass by. What was the speed of the oncoming train if the length of the oncoming train was 75 metres?