Two standard passenger trains 160 meters and 140 meters long run on parallel tracks in opposite directions at 42 km/h and 30 km/h. Find the time needed to cross each other completely. MCQ with Answer and Explanation
Two standard passenger trains 160 meters and 140 meters long run on parallel tracks in opposite directions at 42 km/h and 30 km/h. Find the time needed to cross each other completely.
A. 13 seconds
B. 19 seconds
C. 17 seconds
D. 15 seconds
Answer: Option D
Solution (By JKExamLibrary)
Total distance = 160 + 140 = 300 meters. Relative speed = 42 + 30 = 72 km/h = 20 m/s. Time taken = 300 / 20 = 15 seconds.
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