Question

Q.

Sebuah Kerucut memiliki diameter 48 cm dan tinggi 20 cm Volume dan luas permukaannya ?



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Answer 1

· Kerucut

Diketahui :

- Diameter = 48 cm

- Tinggi = 20

cara mencari jari jari (r)

D = 2 × r

R = D : 2

R = 48 : 2

R = 24

Ditanya :

- Volume

- Luas Permukaan

Jawab :

V = 1/3 × π × r × r × t

V = 1/3 × 3,14 × 24 × 24 × 20

V = 1/3 × 75,36 × 24 × 20

V = 1/3 × 1.808,64 × 20

V = 1/3 × 36.172,8

V = 12.507,6 cm³

LP = π × r × (r + s)

LP = 3,14 × 24 × (24 + 20)

LP = 3,14 × 24 × 44

LP = 75,36 × 44

LP = 3.315,84 cm²

koreksi

Answer 2

DIK :

1. D = 48/2 = 24 => R
2. T = 20 CM

DIT :

LP DAN V !

JAWAB :

LP = πR (R + S)

= 3,14 . 24 CM ( 24 CM + 20 CM )

= 75,36 CM . 44 CM

= 3.315,84 CM²

V = 1/3πRRT

= 1/3 . 3,14 . 24 CM . 24 CM . 20 CM

= 1/3 . 3,14 . 576 CM . 20 CM

= 1/3 . 3,14 . 11.520 CM

= 1/3 . 36.172,8 CM

= 1 . 12.057,6 CM

= 12.057,6 CM³