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[tex] \frac{5}{4 \sqrt{3} } \times \frac{4 \sqrt{3} }{4 \sqrt{3} } = \frac{20 \sqrt{3} }{16 \times 3} = \frac{20 \sqrt{3} }{48} = \frac{5 \sqrt{3} }{12} [/tex]
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