Materi : Bangun Ruang Sisi Lengkung
2 × π × r = K
2 × π × r = 20 cm
π × r = 10 cm
( r = ( 10/π ) cm )
Lp = 4 × π × r²
Lp = 4 × π × 10/π × 10/π
Lp = 4 × 10 × 10/π
Lp = 400/π cm²
Lp = 400/3,14 cm²
Lp = 40.000/314 cm²
{ Lp = 127,388 cm² }
V = 4/3 × π × r³
V = 4/3 × π × 10/π × ( 10/π )²
V = 4/3 × 10 × 100/π²
V = 4.000/( 3 × [3,14]² )
V = ( 4.000 × 100² )/( 3 × 314² )
V = ( 40.000.000 )/( 3 × 98.596 )
V = 40.000.000/295.788
{ V = 135,231 cm³ }
Semoga bisa membantu
Penjelasan dengan langkah-langkah:
Keliling bola = 20 cm
Jari jari = 3,18 cm
Luas permukaan dan Volume bola...
2πr=20
2x3,14xr=20
6,28xr=20
r=20/6,28
r=3,18 [✓]
Luas permukaan bola
4πr²
4x3,14x3,18²
12,56x10,1124
127,012 cm² [✓]
Volume bola
4/3πr³
4/3x3,14x3,18³
4,187x3,18³
134,632 cm³ [✓]
Detail Jawaban:
Mapel : Matematika
Kelas : 9 / [IX] SMP
Materi : Bangun Ruang, Bola
Kode Kategorisasi : -
Kata Kunci : Bangun Ruang, Bola
Demikian
Semoga bermanfaat dan bermanfaat!
" Life is not a problem to be solved but a reality to be experienced! "
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Materi : Bangun Ruang Sisi Lengkung
Jari - Jari Bola Kasti
2 × π × r = K
2 × π × r = 20 cm
π × r = 10 cm
( r = ( 10/π ) cm )
Luas Permukaan Bola Kasti
Lp = 4 × π × r²
Lp = 4 × π × 10/π × 10/π
Lp = 4 × 10 × 10/π
Lp = 400/π cm²
Lp = 400/3,14 cm²
Lp = 40.000/314 cm²
{ Lp = 127,388 cm² }
Volume Bola
V = 4/3 × π × r³
V = 4/3 × π × 10/π × ( 10/π )²
V = 4/3 × 10 × 100/π²
V = 4.000/( 3 × [3,14]² )
V = ( 4.000 × 100² )/( 3 × 314² )
V = ( 40.000.000 )/( 3 × 98.596 )
V = 40.000.000/295.788
{ V = 135,231 cm³ }
Semoga bisa membantu
Penjelasan dengan langkah-langkah:
[Bangun Ruang]
[Bola]
Keliling bola = 20 cm
Jari jari = 3,18 cm
Luas permukaan dan Volume bola...
2πr=20
2x3,14xr=20
6,28xr=20
r=20/6,28
r=3,18 [✓]
Luas permukaan bola
4πr²
4x3,14x3,18²
12,56x10,1124
127,012 cm² [✓]
Volume bola
4/3πr³
4/3x3,14x3,18³
4,187x3,18³
134,632 cm³ [✓]
Detail Jawaban:
Mapel : Matematika
Kelas : 9 / [IX] SMP
Materi : Bangun Ruang, Bola
Kode Kategorisasi : -
Kata Kunci : Bangun Ruang, Bola
Demikian
Semoga bermanfaat dan bermanfaat!