Train crossing a pole or man: speed or time

This type of question, asked 3 times: 17 Sep 2025 S3, 21 Sep 2025 S3, 24 Sep 2025 S3. All 3 questions below, oldest first.

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Question 1
17 Sep 2025 S3
17 $A train 180 m long passes a point in 12 s. Find the speed of the train.$
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Question 2
21 Sep 2025 S3
23 $A train 120 meters long takes 6 seconds to cross a man. What is the speed of the train in km/h?$
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Question 3
24 Sep 2025 S3
23 $A train 150 m long is running at 54 km/h. How long will it take to cross a pole?$
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