Question

The length of the perpendicular from the point $(1,-2,5)$ on the line passing through $(1,2,4)$ and parallel to the line $x+y-z=0=x-2 y+3 z-5$ is :

• A. $\sqrt{\frac{21}{2}}$
• B. $\sqrt{\frac{9}{2}}$
• C. $\sqrt{\frac{73}{2}}$
• D. 1

Answer 1

Answer: (A)

$\sqrt{\frac{21}{2}}$

Answer 2

The correct option is (A): $\sqrt{\frac{21}{2}}$