Volume balok yang mempunyai luas sisi masing masing 150cm2, 120cm2, dan 80cm2 beri caranya

p × l = 150 cm²
      l = [tex] \frac{150}{p} [/tex]

p × t = 120 cm²
      t = [tex] \frac{120}{p} [/tex]

l × t = 80 cm²
[tex] \frac{150}{p} [/tex] × [tex] \frac{120}{p} [/tex] = 80
[tex] \frac{18.000}{ p^{2}} [/tex] = 80
80p² = 18.000
    p² = 225
    p = √225
    p = 15 cm

l = [tex] \frac{150}{p} [/tex] = [tex] \frac{150}{15} [/tex] = 10 cm
t = [tex] \frac{120}{p} [/tex] = [tex] \frac{120}{15} [/tex] = 8 cm

Volume balok = p × l × t
                      = 15 × 10 × 8
                      = 1200 cm³