Question

Find the number of faces of a solid which has 15 edges and 10 vertices.

Answer 1

V+F=E+2 

E=15

V=10

∴10+F=15+2

∴F=17−10

∴F=7

Answer 2

Answer:

Using Euler's formula

V+F=E+2 

E=15

V=10

∴10+F=15+2

∴F=17−10

∴F=7

so the answer is 7

Step-by-step explanation:

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