Jawaban:

14) C

15) D

16) C

17) A

18) C

19) B

Penjelasan dengan langkah-langkah:

14) Volume kubus :

V = s³

= 25×25×25

= 15.625 cm³ (c)

15) Volume bola :

V = 4/3×πr³

= 4/3×22/7×21³

= 4/3×22/7×9.261

= 4/3×22×1.323

= 4×22×441

= 38.808 cm³ (d)

16) Volume prisma :

alas = 2 m = 20 dm

tinggi = 1,5 m = 15 dm

V = L.alas × t.prisma

= (1/2×20×15) × 30

= (10×15)×30

= 150×30

= 4.500 dm³(c)

17) Volume tabung : 1.540 cm³

jari-jari (r) = 7 cm

tinggi = ??

jawab :

V = πr²×t

1.540 = 22/7×7²×t

1.540 = 22/7×49×t

1.540 = 22×7×t

t = 1.540 ÷ (22×7)

= 1.540 ÷ 154

t = 10 cm. (a)

18)Luas permukaan balok :

panjang = 24 cm

lebar = 18 cm

tinggi = 13 cm

Lp = 2(p×l+p×t+l×t)

= 2(24×18+24×13+18×13)

= 2(432+312+234)

= 2×978

= 1.956 cm²(c)

19) Volume kubus :

V = s³

= 18×18×18

= 5.832 cm³

Volume kubus dan balok sama,jadi :

Volume balok :

V = p×l×t

5.832 = 24×9×t

5.832 = 216×t

t = 5.832 ÷ 216

t = 27 cm (b)

SEMOGA BERMANFAAT TERIMAKASIH

jgn lupa kasih bintang 5,like,dan jadikan jawaban tercerdas ya