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?

25
30
40
45

Correct Answer: 30

Explanation:

Speed of the train relative to man

= (63 - 3) km/hr

= 60 km/hr

=	❨	60 x	5	❩	m/sec
			18

=	❨	50	❩	m/sec.
		3

∴ Time taken to pass the man

=	❨	500 x	3	❩	sec
			50

= 30 sec.

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