In a \( \triangle A B C, A=\frac{2 \pi}{3}, b-c=3 \sqrt{3} \mathrm{~cm} \) and \( \Delta=\frac{9...
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In a \( \triangle A B C, A=\frac{2 \pi}{3}, b-c=3 \sqrt{3} \mathrm{~cm} \) and \( \Delta=\frac{9 \sqrt{3}}{2} \mathrm{~cm}^{2} \). Then, the value of \( a \) (in \( \mathrm{cms} \) ), is
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