A train takes 9 s to cross a pole. If the speed of the train

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A train takes 9 s to cross a pole. If the speed of the train is 48 km/h, then length of the train is ?

1. 150 m
2. 120 m
3. 90 m
4. 80 m

Correct Option: B

Let the length of the train be L m.
New , speed = 48 km/h = 48 x (5/18) m/s
Train takes 9 s to cross a pole.
∴ : Length of train, L = Speed x Time
= 48 x (5/18) x 9 = 120 m