Penjelasan dengan langkah-langkah:

10. V seluruhnya = V kubus besar + V kubus kecill

V Kubus Besar = 15×15×15

= 3375 cm³

V kubus kecil = 12×12×12

= 1728 cm³

V seluruhnya = 3375 + 1728

= 5.103 cm³

Jawab : C

11. V seluruhnya = V kerucut + V setengah bola

V kerucut = 1/3 × π × r × r × t

= 1/3 × 22/7 × 21 × 21 × 30

= 22 × 3 × 21 × 10

= 13.860 cm³

V setengah Bola = 1/2 × 4/3 × π × r × r × r

= 1/2 × 4/3 × 22/7 × 21 × 21 × 21

= 1/2 × 4 × 22 × 7 × 3 × 21

= 1/2 × 38.808

= 19.404

V seluruhnya = 13.860 + 19.404

= 33.264 cm 3

Jawab : B

12. Lp Seluruhnya = Lp Kubus + Lp Balok

Lp Kubus = 6 × s × s

= 6 × 10 × 10

= 600 cm²

Lp Balok = 2 × (p×l + p×t + l×t)

= 2 × (12×10 + 12×5 + 10×5)

= 2 × (120 + 60 + 50)

= 2 × 230

= 460 cm²

Lp Seluruhnya = 600 + 460

= 1.060 cm²

Jawab : B