A) \[7\]
B) \[4\sqrt{3}\]
C) \[2\sqrt{13}\]
D) 6
Correct Answer: A
Solution :
\[AD=\left| \frac{\overrightarrow{AP}.\vec{n}}{|\vec{n}|} \right|=\sqrt{61}\] \[\Rightarrow PD=\sqrt{A{{P}^{2}}-A{{D}^{2}}}=\sqrt{110-61}=7\]You need to login to perform this action.
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