6.

• V.Limas = 1/3 × La × T

= 1/3 × (20 × 8) × 12

= 1/3 × 160 × 12

= 1/3 × 1.920

= 640 cm³

• V.balok = p × l × t

= 20 × 8 × 8

= 160 × 8

= 1.280 cm³

• Volume gabungan = V.limas + V.balok

= 640 cm³ + 1.280 cm³

= 1.920 cm³

7.

• V.tabung = π r² t

= 22/7 × 7² × 12

= 22/7 × 49 × 12

= 22 × 7 × 12

= 154 × 12

= 1.848 cm³

• V.kerucut = 1/3 × π × r² × T

= 1/3 × 22/7 × 7² × 6

= 1/3 × 22/7 × 49 × 6

= 22 × 7 × 2

= 154 × 2

= 308 cm³

• Volume gabungan = V.tabung + V.kerucut

= 1.848 cm³ + 308 cm³

= 2.155 cm³

8.

• V.kerucut = 1/3 × π r² × T

= 1/3 × 3,14 × 10² × 15

= 1/3 × 3,14 × 100 × 15

= 1/3 × 314 × 15

= 314 × 5

= 1.570 cm³

• V.bola = 1/2 × 4/3 π r³

= 1/2 × 4/3 × 3,14 × 10³

= 1/2 × 4/3 × 3,14 × 1.000

= 1/2 × 4/3 × 3.140

= 2/3 × 3.140

= 2.093,333 cm³

• Volume gabungan = V.kerucut + V.bola

= 1.570 cm³ + 1.093,333 cm³

= 3663,333 cm³

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