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6) V = s³

3.375 = s³

s = ³√3.375

s = 15 cm

Panjang Kerangka = 12 x 15 cm = 180 cm

Panjang Besi Beton Minimal

= 2 x 180 cm

= 360 cm = (360 : 100) m

= 3,6 m

7) V. Kardus = 91.125 cm³

V. Mainan = 15³ = 3.375 cm³

Banyak Mainan = 91.125/3.375 = 27 buah

8) Panjang Besi Beton = 12 m = 1.200 cm

Panjang Kerangka = 4 x (p + l + t) = 4 x (8 + 5 + 2) = 4 x 15 = 60 cm

Banyak Kerangka = 1.200/60 = 20 buah

9) p = 2 m = 20 dm

l = 1,5 m = 15 dm

t = 1 m = 10 dm

V. Air = p x l x t

2.400 = 20 x 15 x t

2.400 = 300 x t

t = 2.400/300

t = 8 dm = (8 x 10) cm = 80 cm