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Verified answer
Lo = 2 mα = 2,35 × 10^-5 /°C
ΔT = 50 - 0 = 50°C
Lt = ΔL + Lo
ΔL = Lo . α . ΔT
ΔL = 2 . 2,35 × 10^-5 . 50
ΔL = 2,35 × 10^-3
ΔL = 0,00235 m
Jadi
Lt = 0,00235 + 2
Lt = 2,00235 meter