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= 20cm × 0,000012/°C × (80°C - 15°C)
= 20 × 0,000012 × 65
= 0,0156 cm
20 cm + 0,0156 cm = 20,0156 cm
α = 0,000012/°C
Δt = t₁ - to
= 80 - 15
= 65°C
Ditanyakan : L₁ (Lo + ΔL)
Penyelesaian : ΔL = Lo . α . Δt
= 20 . 0,000012 . 65
= 0,0156 cm
L₁ = Lo + ΔL
= 20 + 0,0156
= 20,0156 cm