How many seconds will a 250 m 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?
Options.
A) 12	B) 30	C) 40	D) 15	E) 60
Speed of train relative to man = 63 - 3= 
<gadget id="calculator">63 - 3</gadget>
<output>60</output>
60 km/hr.= 60 * 5/18 = 50/3 m/sec.   Time taken to pass the man = 250 * 3/50= 
<gadget id="calculator">250 * 3/50</gadget>
<output>15</output>
15 sec.   Answer: Option 15
<result>D</result>
How many seconds will a 250 m 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?