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30N/40cm2 = F2/120cm2
dikali silang hasilnya 90 Newton
Abesar = 40cm2
Akecil = 120cm2
Fkecil = 30N
Dit: Fbesar =... N
Fbesar/Abesar = Fkecil/Akecil
X/40cm2 = 30N/120cm2
X = 40x30/120
X = 10N
Jd, gaya penampang besar sebesar 10N
Kalau gak salah ya..