Answer:
the distance the train needs to travel to cross the pole = length of the train
time = distance/speed
speed = 72km/hr = 72 x 1000/3600 = 20m/s
time = 180/20
time = 9s
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Answer:
the distance the train needs to travel to cross the pole = length of the train
time = distance/speed
speed = 72km/hr = 72 x 1000/3600 = 20m/s
time = 180/20
time = 9s