9. A train 360m long moves at a speed of 72km/h. Calculate the time taken by it to cross a) a pole b) a bridge 120m long. (2 Points) a) 18 s b) 24 s a) 15 s b) 24 s a O ) a) 18 s b) 25 s O a) 15 s b) 20 S This question is required.
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Answer:
a) 18 s b) 24 s
Step-by-step explanation:
Speed => 72 km/h = 72 × 5/18 m/s = 20 m/s
Time taken to cross a pole = Lengthof the train /Speed = 360/20 s = 18 s
Time taken to cross a bridge = [Length of the (train + bridge)]/Speed = [360 + 120]/20 s = 480/20 s = 24 s
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