Q15
A solid has 12 vertices and 30 edges. How many faces does it have?
A.
22
B.
24
C.
26
D.
20
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
In a solid by Euler's formulaFaces + Vertices - 2 = Edges
⇒ Faces + 12 - 2 = 30
⇒ Faces = 30 - 10 = 20