How many seconds will a 700 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?
Choose the correct choice:
A) 23 sec B) 30 sec C) 27 sec D) 36 sec E) 42 sec
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 = 700 * 3/50= 
<gadget id="calculator">700 * 3/50</gadget>
<output>42</output>
42 sec.   Answer:42 sec
<result>E</result>
How many seconds will a 700 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?