Perbandingan rusuk rusuk yang bertemu pada pojok suatu balok adalah 5:3:1 . Jika volume balok 405cm kubik ,hitunglah panjang,lebar,dan tinggi balok serta luas permukaan nya.
NrDoubleH
V = plt 405 = 5x.3x.x 405 = 15.x³ 405/15 = x³ 27 = x³ ∛27 = x 3 = x panjang = 5x = 5.3 = 15 cm lebar = 3x = 3.3 = 9 cm tinggi = x = 3 cm
405 = 5x.3x.x
405 = 15.x³
405/15 = x³
27 = x³
∛27 = x
3 = x
panjang = 5x = 5.3 = 15 cm
lebar = 3x = 3.3 = 9 cm
tinggi = x = 3 cm
Lp = 2(pl+pt+lt)
Lp = 2 (135 + 45 + 27)
Lp = 2 (207)
Lp = 414 cm²