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p =6 x, l=3 x, t=4 x
Dibuat persamaan:
Luas= 2pl + 2pt + 2pt
= 148x^2
Jadi,
148x^2=33300
x^2=225
x=15
disubtitusikan ke p = 6x = 6(15) = 90
disubtitusikan ke l = 3x = 3(15) = 45
disubtitusikan ke t = 4x = 4(15) = 60