Hello,
Given data: Speed (v) of train = 60 km/hr. And it takes 9 seconds to cross a pole. Therefore, time (t) = 9 seconds. Now as we know 1 km = 1000 meters. And 1 hr. = 3600 sec. So 1(km/hr.) = (1000/3600) = (5/18) meter/seconds So 60 km/hr. = 60×518=50360×518=503 m/sec. So the speed (v) of the train = 503503 m/sec. Now as we know speed (v), distance (d) and time (t) is related as d = v×t Units. Now let the length of the train be l m. ⇒l=v×t⇒l=v×t Meters. Now substitute the values in above equation we have, ⇒l=503×9=150⇒l=503×9=150 Meters. So this is the required answer.
I hope this would help you.
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