A cyclist goes from a place to another and returns by the same route. He pedals his way uniformly with speed $u$ while going and with speed $v$ while returning. The average speed of his journey is

  • A

    $\frac{u+v}{2}$

  • B

    $\frac{u-v}{2}$

  • C

    $\frac{1}{\frac{1}{2}\left(\frac{1}{u}+\frac{1}{v}\right)}$

  • D

    $\frac{1}{\frac{1}{2}\left(\frac{1}{u}-\frac{1}{v}\right)}$

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