How many seconds will a 500 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?
Pick:	A) 25	B) 30	C) 40	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=500*3/50= 
<gadget id="calculator">500*3/50</gadget>
<output>30</output>
30sec   ANSWER:30
<result>B</result>
How many seconds will a 500 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?