Question

The two vectors $\hat{i}+\hat{j}+\hat{k}$ and $\hat{i}+3\hat{j}+5\hat{k}$ represent the two sides $\vec{AB}$ and $\vec{AC}$ respectively of a ΔABC. The length of the median through A is

• A. $\frac{\sqrt{14}}{2}$
• B. 14
• C. 7
• D. $\sqrt{14}$

Answer 1

Answer: (D)

$\sqrt{14}$

Answer 2

The correct answer is (D) : $\sqrt{14}$.