How many seconds will a 500 meter 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?	Choose the correct choice from the following options:
A) 299 B) 112 C) 500 D) 167 E) 123
Let length of tunnel is x meter   Distance = 800+x meter   Time = 1 minute = 60 seconds   Speed = 78 km/hr = 78*5/18 m/s = 65/3 m/s   Distance = Speed*Time   800+x = (65/3) * 60   800+x = 20 * 65= 
<gadget id="calculator">20 * 65</gadget>
<output>1_300</output>
1300   x= 1300 - 800= 
<gadget id="calculator">1300 - 800</gadget>
<output>500</output>
500 meters   Answer:500
<result>C</result>
How many seconds will a 500 meter 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?