Find the ratio in which the line segment joining the points (4, 8, 10) and
(6, 10, -8) is divided by the yz-plane.
Let A = (4, 8, 10) B = (6, 10, -8)
Let the line joining A and B be divided by the YZ - plane at point P in the ratio λ:1.
Since P lies on the YZ - plane, the x-coordinate of P will be zero.