A) \[4\sqrt{3}\]
B) \[5\sqrt{3}\]
C) \[6\sqrt{3}\]
D) \[3\sqrt{3}\]
Correct Answer: B
Solution :
\[AB=BC+10\,\,cm\] \[BD=\frac{1}{2}BC=5cm\] \[\therefore \] \[AD=\sqrt{{{10}^{2\,\,\,\,\,\,\,\,\,\,\,\,}}}{{5}^{2}}=\sqrt{100\,\,\,\,\,\,25}\] \[=\sqrt{75}\,\,=\,\,5\sqrt{3}\]
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