A train running at the speed of 45 kmph took 12 seconds in passing a certain point. Then the length of the train must be?

90 meters
120 meters
150 meters
540 meters

Correct Answer: 150 meters

Explanation:

∵ Speed = (45 x 5/18) = (25/2) m/sec
Distance = (Time x Speed) = (12 x 25 / 2 ) meters
= 150 meters
∴ Length of the train = 150 meters

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