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google search
Google search results:
1: https://www.toppr.com/ask/en-us/question/two-trains-running-in-opposite-directions-cross-a-man-standing-on-the-platform-in-27/
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2: https://www.examveda.com/two-trains-running-in-opposite-directions-cross-a-man-standing-on-the-platform-in-27-seconds-and-17-seconds-respectively-and-they-cross-each-other-in-23-seconds-the-ratio-18281/
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3: https://www.quora.com/Two-trains-running-in-opposite-directions-cross-a-man-standing-on-the-platform-in-27-seconds-and-17-seconds-respectively-and-they-cross-each-other-in-23-seconds-What-is-the-ratio-of-their-speeds
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4: https://www.indiabix.com/aptitude/problems-on-trains/discussion-467
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5: https://gmatclub.com/forum/two-trains-running-in-opposite-directions-cross-a-man-standing-on-the-254470.html
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6: https://testbook.com/question-answer/two-trains-running-in-opposite-directions-cross-a--607a7e54ca2102cd420285f7
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7: https://testbook.com/question-answer/two-trains-running-in-opposite-directions-cross-a--60c1c86cf8e07125bc1e7bb1
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8: https://www.mastguru.com/two-trains-running-in-opposite-directions-cross-a-man-standing-on-the-platform-in-27-secon/952
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9: https://www.youtube.com/watch?v=R5z5BbBsyGY
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10: https://www.competoid.com/quiz_answers/14-0-61027/Question_answers/
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11: https://www.math-only-math.com/two-trains-passes-in-the-opposite-direction.html
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