Jawaban:

1. 2.205 cm³

2. 2.240 cm³

Penjelasan dengan langkah-langkah:

1. volume 1/2 tabung:

= ½ × π × r² × t

= ½ × 22/7 × 7² × 15

= ½ × 22/7 × 49× 15

= 1.155 cm³

volume balok:

= p × ℓ × t

= 15 × 14 × 5

= 1.050 cm³

volume gabungan:

= volume 1/2 tabung + volume balok

= 1.155 cm³ + 1.050 cm³

= 2.205 cm³

2. volume limas: 

= ⅓ × Lalas × t limas

= ⅓ × (15 × 8) × (32 - 12)

= ⅓ × 120 × 20

= 800 cm³

volume balok:

= p × ℓ × t

= 15 × 8 × 12

= 1.440 cm³

volume gabungan:

= volume limas + volume balok

= 800 cm³ + 1.440 cm³

= 2.240 cm³