A train 100 m long runs at 72 km/h. How many seconds does it take to cross a pole?
Answer and explanation
Correct answer: B. 5 seconds
- Step 1: Speed = 72 x 5/18 = 20 m/s.
- Step 2: Time = distance / speed = 100 / 20 = 5 s.
Answer
5 seconds.
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