A) \[\frac{4}{5}\,\,\sqrt{5}\]
B) \[\frac{2}{5}\,\,\sqrt{5}\]
C) \[\frac{3}{5}\,\,\sqrt{5}\]
D) \[\frac{1}{5}\,\,\sqrt{5}\]
E) None of these
Correct Answer: A
Solution :
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