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JAMB Mathematics 1978 Question 26

Question 26

Mensuration of Solids

A pyramid is constructed on a cuboid. The figure has

  1. A.Twelve faces
  2. B.Thirteen vertices
  3. C.Fourteen edges
  4. D.Fifteen edges
  5. E.Sixteen edges.
Show the answer and explanation

Answer: E (Sixteen edges.)

Explanation

The cuboid has 12 edges and the pyramid on top adds 4 slant edges, giving 16 edges (it has 9 faces and 9 vertices).