Perbandingan panjang, lebar, tinggi sebuah balok adalah 3:2:1. Jika volume balok 750 cm3. Tentukan berapa panjang, lebar, tinggi balok.

mencari nilai a
v = p x l x t
750 = 3a x 2a x 1a
750 = 6a³
a³ = 750 / 6
a³ = 125
a = ∛125
a = 5

panjang = 3a = 3(5) = 15 cm
lebar = 2a = 2(5) = 10 cm
tinggi = 1a = 1(5) = 5 cm

p = 3x
l = 2x
t = x

p × l × t = volume balok
3x × 2x × x = 750
6x³ = 750
x³ = 125
x = ³√125
x = 5 cm

Panjang balok
= 3x
= 3(5)
= 15 cm

Lebar balok
= 2x
= 2(5)
= 10 cm

Tinggi balok
= x
= 5 cm