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

Question

$\frac{5 A}{2}$

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

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

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

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