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perbandingan p : l : t = 3 : 2 :1
faktor pengali = y
Lp = 352 cm
maka :
Lp = 2 x (pxl + pxt + lxt)
352 = 2 x (3yx2y + 3yxy + 2yxy)
352 = 2 x (6y² + 3y² + 2y²)
352 = 2 x (11y²)
352 = 22y²
y² = 352/22
y = √16
y = 4
jadi :
panjang = 3 x 4 = 12 cm
lebar = 2 x 4 = 8 cm
tinggi = 1 x 4 = 4 cm