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Verified answer
A = L²ΔL = 2 % = 0,02
ΔA = 2(ΔL) = 2(0,02) = 0,04
ΔF = 4% = 0,04
Tekanan
P = F/A
ΔP = ΔF/F + ΔA/A
ΔP = 0,04 + 0,04 (nilai F dan A bisa diabaikan)
ΔP = 0,08