In what time will a train 100 metres long cross an electric

In what time will a train 100 metres long cross an electric pole, if its speed be 144 km/hour ?

Speed of the train

= 144 kmph = 144 ×	5	= 40 m/s
	18

When a train crosses a pole, it covers a distance equal to its own length.

The required time =	100
	40

=	5	= 2 5. seconds.
	2

3	5	seconds
	4