12. Volume kubus = 216 satuan

Volume kubus = s × s × s / s³

Maka,

s³ = 216

s = ³√216

s = 6 satuan (B)

13. Panjang kubus = 17 cm

Maka,

Volume kubus = 17 × 17 × 17

= 4913 cm³ (D)

14. Volume kubus = 8000 cm³

Volume kubus = s × s × s / s³

Maka,

s³ = 8000

s = ³√8000

s = 20 cm (C)

15. Volume kubus = 4913 cm³

Volume kubus = s × s × s / s³

Maka,

s³ = 4913

s = ³√4913

s = 17 cm (B)

16. 5/8 bagian = 320 liter

Maka,

1/8 bagian = 320 ÷ 5

= 64 liter

1 bagian penuh = 64 × 8

= 512 liter

= 512 dm³ (volume kubus)

Volume kubus = s × s × s / s³

Maka,

s³ = 512

s = ³√512

s = 8 dm

s = 8 × 10 cm (1 dm = 10 cm)

s = 80 cm (C)

17. Hitung panjang, lebar, dan tinggi balok

Panjang = 4 satuan

Lebar = 3 satuan

Tinggi = 5 satuan

Volume balok = panjang × lebar × tinggi

= 3 × 4 × 5

= 60 satuan (D)