Distance of the point (3, 4, 5) from the origin (0, 0, 0) is?

The correct option is D $\sqrt{50}$
The distance between two points $P(x_1,y_1,z_1)$ and $Q(x_2,y_2,z_2)$ is given by

$PQ=\sqrt{(x_2-x_1{)}^2+(y_2-y_1{)}^2+(z_2-z_1{)}^2}$

$\therefore$ Distance between points $A(3,4,5)$ and origin $O(0,0,0)$ is

$AO=\sqrt{(3-0{)}^2+(4-0{)}^2+(5-0{)}^2}$

$\Rightarrow AO=\sqrt{9+16+25}$

$\Rightarrow AO=\sqrt{50}$

Hence, distance of the point $(3,4,5)$ from the origin $(0,0,0)$ is $\sqrt{50}.$

∴ Option (A) is correct.