Question

Perpendicular distance of the point (3, 5, 6) from y-axis is _______________________________.

Answer 1

For given point (3, 5, 6) y coordinate is 5
i.e Any point an y-axis has y-coordinate as 5 and rest zero.
i.e Point an y-axis is of the form (0, 5, 0)
∴ Perpendicular distance of (3, 5, 6) from y-axis $\sqrt{{\left(3-0\right)}^2+{\left(5-5\right)}^2+{\left(6-0\right)}^2}$

$=\sqrt{9+0+36}=\sqrt{45}$