If a spring of stiffness $k$ is cut into two parts $A$ and $B$ of length $l_{A}: l_{B}=2: 3$, then the stiffness of spring $A$ is given by

  • [AIEEE 2011]
  • A

    $\frac{5}{2} k$

  • B

    $\frac{3}{5} k$

  • C

    $\frac{2}{5} k$

  • D

    $k$

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