How many seconds will a 700 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?	Select
A) 25  B) 30  C) 42  D) 45  E) 50
Relative speed of the train=63-3= 
<gadget id="calculator">63-3</gadget>
<output>60</output>
60kmph=60*5/18=50/3 m/sec   t=700*3/50= 
<gadget id="calculator">700*3/50</gadget>
<output>42</output>
42sec   ANSWER:42
<result>C</result>
How many seconds will a 700 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?