perbandingan panjang, lebar,dan tinggi sebuah balok adalah 3:2:1, jika volume balok 750 cm pangkat 2.tentikan luas permukaan balok

Volume balok = 750 cm³
R = p × l × t
Jawab :
3x × 2x × 1x = 750 cm³
6x = 750 cm
x = 750 / 6
x = ³√125
x = 5 cm

P = 3 × 5 = 15 cm
L = 2 × 5 = 10 cm
T = 1 × 5= 5 cm

Luas = ??
R = 2(pl+pt+lt)
= 2(15.10 + 15.5 + 10.5)
= 2(150 + 75 + 50)
= 2(275)
= 550 cm²

Diketahui:
p = 3a
l = 2a
t = a
V = 750 cm³

Ditanya:
Luas permukaan (Lp) = ???

Jawab:
V = p x l x t
750 = 3a x 2a x a
750 = 6a³
a³ = 750/6
a³ = 125
a = ∛125
a = 5

p = 3a = 3(5) = 15 cm
l = 2a = 2(5) = 10 cm
t = a = 5 cm

Maka ↓↓↓
Lp = 2(pl + pt + lt)
Lp = 2(15.10 + 15.5 + 10.5)
Lp = 2(150 + 75 + 50)
Lp = 2(275)
Lp = 550 cm²