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If F = 18 and V = 10, then find the value of E in Euler’s formula.

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Solution

We know that
V + F – E = 2
⇒ 10 + 18 – E = 2
⇒ 28 – E = 2
⇒ E = 28 – 2 = 26
Hence, the required value of E = 26

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