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If α, β and γ denote the coefficients of linear, areal and volumetric expansion respectively, which relation is correct?

1. γ = 3α
2. β = 3γ
3. β = 3α
4. γ = 3β

Correct answer: γ = 3α

Solution

The coefficients relate as beta = 2*alpha and gamma = 3*alpha. Hence the correct relation among the options is gamma = 3*alpha.

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