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Q:

Two trains of equal length take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 meters, in what time (in seconds) will they cross each other traveling in opposite direction? 

  • 1
    12
  • 2
    10
  • 3
    16
  • 4
    15
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Answer : 1. "12 "

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