How many seconds will a 500 metre long train take to cross

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 ?

Relative speed of train = 63–3 = 60 kmph

= 60 ×	5	m/sec
	18

∴ Time =	Length of train
	Relative Speed

=	500 × 18	= 30 sec.
	60 × 5