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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?

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?
A.25B.30
C.40D.45


Answer: Option B
Explanation:
Speed of the train relative to man= (63 - 3) km/hr
= 60 km/hr
=(60 x5(m/sec
18
=(50(m/sec.
3
Therefore Time taken to pass the man
=(500 x3(sec
50
= 30 sec.

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