Penjelasan dengan langkah-langkah:

1. a

V = 22/7 x 14² x 16

V = 22 x 196/7 x 16

V = 616 x 16

V = 6.160 + 3.696

V = 9.856 cm³

2. d

Luas selimut = πrs

s = 550 x 7/(22 x 7)

s = 3.850/154

s = 25 cm

3.

Lp = 2 x 22/7 x 7 x (7 + 10)

Lp = 44 x 17

Lp = 748 cm²

4. c

V.air = 3,14 x 10² x (14–2)

V.air = 314 x 12

V.air = 3.768 cm³

5. c

Luas dicat = πd²/2

Luas dicat = 3,14 x 20²/2

Luas dicat = 3,14 x 200

Luas dicat = 628 m²

Banyat cat = 628 x ¼

Banyak cat = 600/4 + 28/4

Banyak cat = 157 kaleng

6. b

Lptt = πr(r + 2t)

= 22/7 x 28/2 x (28/2 + 2x10)

= 44 x 34

= 1.496 cm²

7. a

s = √(6² + (16/2)²)

s = √(36+64)

s = √100

s = 10 cm

Lp = πr(r + s)

Lp = 3,14 x 8 x (8 + 10)

Lp = 3,14 x 144

Lp = 452,16 cm²

8. c

V = ⅔πr³

V = ⅔ x 3,14 x 15³

V = 6,28 x 3.375/3

V = 7.065 cm³

9. b

V = πr²t

r² = 5.024/(3,14 x 16)

r² = 5.024/50,24

r² = 100

r = √100

r = 10 cm

10.

r1 : r2 = 20 : 40

r1 : r2 = 1 : 2

V1 : V2 = 1³ : 2³

V1 : V2 = 1 : 8

11. c

Luas kulit = πd²/2

= 3,14 x 24²/2

= 3,14 x 576/2

= 3,14 x 288

= 904,32 cm²