A vehicle travels $4\,km$ with speed of $3\,km / h$ and another $4\,km$ with speed of $5\,km / h$, then its average speed is $..........km/h$

  • [JEE MAIN 2023]
  • A

    $4.25$

  • B

    $3.50$

  • C

    $4.00$

  • D

    $3.75$

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  • [AIPMT 2011]

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