In what time will atrain 100 meters long cross an electric pole, if its speed is 144 km/hr.?

In what time will atrain 100 meters long cross an electric pole, if its speed is 144 km/hr.? Correct Answer 2.5 seconds

  Speed of the train  = 144 kmph = 144×185​ = 40 m/sec Length of electric pole  = 100 meter Time taken to cross the electric pole  = 40100​                                                                 = 2.5 seconds
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