1)
a) S = 4 x 5 + 4 x 3 + 4 x 2 = 20 + 12 + 8 = 40 cm
b) At = 2 (lxL + lxh + hxL) = 2 (15 + 6 + 10) = 62 cm²
c) V = L x l x h = 30 cm³
2)
a) At = 2 (lxL + lxh + hxL) = 2 (48 + 60 + 80) = 376 m²
b) V = L x l x h = 8 x 6 x 10 = 480 m³
3)
a) S = 12 x 12 = 144 cm
b) V = L³ = 12³ = 1728 cm³
c) At = 6 x L² = 6 x 144 = 864 cm²