$A$ body weighs $6$ gms when placed in one pan and $24$ gms when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, the true weight of the body is ....... $gm$.

  • A

    $13$

  • B

    $12$

  • C

    $15.5$

  • D

    $15$

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