Question: Let $Q$ be the foot of perpendicular from the origin to the plane $4 x-3 y+z+13=0$ and $R$ be a point $(-1,1,-6)$ on the plane. Then length $Q R$ is :
$3 \sqrt{\frac{7}{2}}$
$\sqrt{14}$
$\sqrt{\frac{19}{2}}$
$\frac{3}{\sqrt{2}}$
Correct Option: 1
Solution:
