Jawaban:

No 1).

V gabungan = Volume kubus + V balok

V kubus = s × s × s

V kubus = 5 × 5 × 5

V kubus = 25 × 5

V kubus = 125 cm³

V balok = p × l × t

V balok = 10 × 5 × 5

V balok = 50 × 5

V balok = 250 cm³

V gabungan = 125 + 250

= 375 cm³

No 2).

V gabungan = V kerucut + V tabung

V kerucut = ⅓ × phi × r² × t

V kerucut = ⅓ × 22/7 × 7 × 7 × 12

V kerucut = 22 × 7 × 4

V kerucut = 154 × 4

V kerucut = 616 cm³

V tabung = phi × r² × t

V tabung = 22/7 × 7 × 7 × 12

V tabung = 22 × 7 × 12

V tabung = 154 × 12

V tabung = 1.848 cm³

V gabungan = 616 + 1.848

= 2.464 cm³