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Train A has a length of 500 m and speed of 20 m/s. Train B has a length of 400 m and speed of 30 m/s. They cross each other while running on parallel tracks in opposite directions. Immediately after crossing, both came to a halt and both reversed their engines and again crossed each other. When they reversed, speeds were only 20% of their actual respective speeds. What is the total time taken in crossing each other twice?

Answer» Train A has a length of 500 m and speed of 20 m/s. Train B has a length of 400 m and speed of 30 m/s. They cross each other while running on parallel tracks in opposite directions. Immediately after crossing, both came to a halt and both reversed their engines and again crossed each other. When they reversed, speeds were only 20% of their actual respective speeds. What is the total time taken in crossing each other twice?


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