5. V tabung :

r = 14 ÷ 2 = 7

= × r² × t

= 22/7 × 7 × 7 × 15

= 154 × 15

=   2310 cm³

6. v prisma :

= (1/2 × alasΔ × tinggiΔ) × t prisma

= (1/2 × 8 cm × 4 cm) × 20 cm

= 16 cm² × 20 cm

= 320 cm³

7. v tabung :

r = 20 ÷ 2 = 10

= 3,14 × 10 × 10 × 25

= 314 × 25

= 7850 cm³

8. v balok :

= p × l × t

= 15 × 12 × 10

= 1800 dm³

v air yg terisi :

= 1800 × 3/5

= 360 × 3

= 1080 dm³

v air yg prlu di isi :

= 1800 - 1080

= 720 dm³

9. v balok :

= p × l × t

= 60 × 50 × 35

= 3000 × 35

= 105000 cm³

= 105 dm³

v air yg terisis :

= 150000 × 1/2

= 75000 cm³

= 75 dm³

v air yg perlu diisi:

= 105 - 75

= 35 dm³

10. v prisma :

= (1/2 × alasΔ × tinggiΔ) × t prisma

= (1/2 × 8 × 10) × 15

= 40 × 15

= 600 cm³

11. v tabung :

r = 20 ÷ 2 = 10

= × r² × t

= 3,14 × 10 × 10 × 20

= 314 × 20

= 6820 cm³

12. v tabung :

r = 20 ÷ 2 = 10

= × r² × t

= 3,14 × 10 × 10 × 12

= 314 × 12

= 3768 cm³

ini deck no 12 ny cri sendiri :]