perbandingan pjang rusu kubus 1:3 jumlah luas permukaan keduanya 240cm2 perbandingan volume brpa

Lp1 + Lp2 = 240
6(s²) + 6(s²) = 240
6(1x)² + 6(3x)² = 240
6(x²) + 6(9x²) = 240
6x² + 54x² = 240
60x² = 240
x² = 240/60
x² = 4
x = √4
x = 2

(s) rusuk kubus 1 = 1x = 2 cm
(s) rusuk kubus 2 = 3x = 3(2) = 6 cm

Perbandingan volume :
= V1 : V3
= s³ : s³
= 2³ : 6³
= 8 : 216 [sama sama bagi 8]
= 1 : 27 ✔