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Two trains of lengths 150m and 150m are running in opposite directions at speeds of 50 km/hr and 40 km/hr respectively. In what time will they cross each other?150 मीटर और 150 मीटर लंबी दो ट्रेनें विपरीत दिशाओं में क्रमशः 50 किमी/घंटा और 40 किमी/घंटा की गति से चल रही हैं। वे एक-दूसरे को कितने समय में पार करेंगी?

  • A
    10 seconds
    10 सेकंड
  • B
    12 seconds
    12 सेकंड
  • C
    15 seconds
    15 सेकंड
  • D
    20 seconds
    20 सेकंड
Explanation:
Relative speed = 50 + 40 = 90 km/hr = 90 * (5/18) = 25 m/s. Total distance = 150 + 150 = 300m. Time = 300 / 25 = 12 seconds.
सापेक्ष गति = 50 + 40 = 90 किमी/घंटा = 25 मीटर/सेकंड। कुल दूरी = 300 मीटर। समय = 300/25 = 12 सेकंड।

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This question belongs to the set "Reasoning & General Studies Practice Test #1 for VDO, Patwari, Lekhpal". Click below to read detailed notes and attempt the full quiz.

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