$A$ body travels $102.5 \ m$ in the $n^{\text{th}}$ second and $115.0 \ m$ in the $(n+2)^{\text{th}}$ second. The acceleration is: (in $m/s^2$)

  • A
    $9$
  • B
    $6.25$
  • C
    $12.5$
  • D
    $5$

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