A car travels a distance of $x$ with speed $v_1$ and then same distance $x$ with speed $v_2$ in the same direction. The average speed of the car is

  • [JEE MAIN 2023]
  • A

    $\frac{ v _1 v _2}{2\left( v _1+ v _2\right)}$

  • B

    $\frac{v_1+v_2}{2}$

  • C

    $\frac{2 x }{ v _1+ v _2}$

  • D

    $\frac{2 v _1 v _2}{ v _1+ v _2}$

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