A train 120 meters long, crosses a pole in 10 seconds. The speed of the train is?

40 km/hr
43.2 km/hr
45 km/hr
None of these

Correct Answer: 43.2 km/hr

Explanation:

Length of train = 120 m.
Total taken in crossing the pole = 10 seconds.
Speed of the train = length / time
= 120 / 10
= 12 m/s
= 12 x (18/5)
= 43.2 km/hr

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