Question
Two trains of lengths 100 m and 140 m move toward each other at 10 m/s and 14 m/s. How long do they take to cross?
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Correct Answer: A. 10 seconds
Explanation:
Total distance is 100 + 140 = 240 meters.
Relative speed is 10 + 14 = 24 m/s, so time = 10 seconds.
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