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### Question Asked by a Student from EXXAMM.com Team

** Q 1815423360. ** In the following cases find the coordinates of

the foot of perpendicular drawn from the origin

(a) `2x + 3y + 4z -12 =0`.

(b) `3y + 4z - 6 = 0`

(c) `x + y + z = 1`

(d)` 5y + 8 = 0`