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ΔT = 100° - 10° = 90°C
α = 2 x 10⁻⁶/°C → β = 4 x 10⁻⁶/°C
A = ...............?
Penyelesaian :
A = A₀ (1 + β • ΔT)
A = 50 (1 + 4 x 10⁻⁶ • 100)
A = 50 (1,0004)
A = 50,02 cm²
Jadi, luasnya akan menjadi 50,02 cm²