How many seconds will a 900 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 from the following answers.
A) 23 sec	B) 30 sec	C) 49 sec	D) 54 sec	E) 59 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 = 900 * 3/50= 
<gadget id="calculator">900 * 3/50</gadget>
<output>54</output>
54 sec.   Answer:54 sec
<result>D</result>
How many seconds will a 900 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?