Discussion :: Problems on Trains

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?
Answer : Option A
Explanation :
Speed of the train relative to man  = (63  3) km/hr 
= 60 km/hr  
=\((69\times\frac{5}{18})m/sec\)  
=\((\frac { 50 } { 3 } ) m/sec\)  
Time taken to pass the man  =\((500\times\frac{3}{50})sec\) 
= 30 sec. 
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