Given: Speed of the train = 60 km∕hr Time is taken by a train of crossing a pole = 9 seconds Concept used: The distance travelled by train will be its length. Formula used: Distance=speed×time 1 km = 1000 metre And 1 hour = 3600 seconds Calculation: Length of the train = 60 km∕hr × 9 seconds ⇒ [
(60×1000)
3600
]×9 ⇒
(600×9)
36
⇒ 150 meters ∴ The length of the train is 150 metres.