CTET PAPER II 2021 · PYQ · Polyhedra / Euler's Formula · easy
The number of edges of a polyhedron, which has 7 faces and 10 vertices, is
- A.13
- B.14
- C.15✓ Correct
- D.17
Using Euler's formula for polyhedra: V − E + F = 2. Given V = 10, F = 7, so 10 − E + 7 = 2, giving E = 15. Hence the polyhedron has 15 edges.
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