How many seconds will a 500 m long train take to cros a man walking with a speed of 3 kmph in the direction of the moving train if the speed of the train is 63 kmph  Choose the correct choice from the following answers.
A) 25
B) 30
C) 40
D) 45
E) 50
time=distance(here length of the train)/relative speed (63-3)   thus time=500/60*5/18=500*18/ 60*5   =30 seconds   ANSWER:30
<result>B</result>
How many seconds will a 500 m long train take to cros a man walking with a speed of 3 kmph in the direction of the moving train if the speed of the train is 63 kmph