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Question

How many faces does a solid with 6 vertices and 15 edges have?


A

16

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B

11

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C

18

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D

19

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Solution

The correct option is B

11


V = 6, E = 15

Euler's formula

F + V - E = 2

F + 6 - 15 = 2

F - 9 = 2

F = 11


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