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

** Q 1668380205. ** A point `P(1, 2, 3)` is one

vertex of a cuboid formed by the coordinate planes and the

planes passing through `P` and parallel to the coordinate

planes.

What is the length of one of the diagonals of the

cuboid?

**NDA 2015 Paper 1 April**