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30 cm x 20 N = 120 cm x F
600 N cm = 120 F cm
120 F cm = 600 N cm
F = 600 N cm / 120 cm
F = 5 N
Keuntungan mekanisny adalah Lk / Lb
= 120 / 30
= 4
Add jadi yng terbaik y kaka....
jadi C :D