A solid has 12 vertices and 30 edges. Ho

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

A solid has 12 vertices and 30 edges. How many faces does it have?

Options:

Correct Answer:

Explanation:

Vertices (v) - Edges (e) + Faces (f) = 2

⇒ v - e + f = 2

Here, v = 12 and edges = 30

Thus,

⇒ 12 - 30 + f = 2

⇒ f - 18 = 2

⇒ f = 20