A pyramid is constructed on a cuboid. The figure has
 

  • A twelve faces
  • B thirteen vertices
  • C fourteen edges
  • D fifteen edges
  • E sixteen edges
jamb 1978mathematics

The correct answer is E. sixteen edges

A cuboid has 6 faces, 12 edges, and 8 vertices. If a pyramid is constructed on top of the cuboid, it will add 1 more face (the base of the pyramid coincides with one face of the cuboid), 4 more edges, and 1 more vertex.

So, the figure will have a total of \(6 + 1 = 7\) faces, \(12 + 4 = 16\) edges, and \(8 + 1 = 9\) vertices.

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