Two forces having magnitude $A$ and $\frac{ A }{2}$ are perpendicular to each other. The magnitude of their resultant is

  • [JEE MAIN 2023]
  • A

    $\frac{\sqrt{5}\,A }{4}$

  • B

    $\frac{5\,A }{2}$

  • C

    $\frac{\sqrt{5}\,A ^2}{2}$

  • D

    $\frac{\sqrt{5}\,A }{2}$

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