a. diameternya 28 cm
r = 28/2
r = 14 cm
V = 4/3 × 22/7 × 14³
V = 4/3 × 22/7 × 2.744
V = 34.496/3
V = 11.498,6 cm³
L = 4 × 22/7 × 14²
L = 4 × 22/7 × 196
L = 2.464 cm²
b. jari-jarinya 10 cm
V = 4/3 × 3,14 × 10³
V = 4/3 × 3,14 × 1.000
V = 69.080/7
V = 9.868,57 cm³
L = 4 × 3,14 × 10²
L = 4 × 3,14 × 100
L = 1.256 cm²
c. jari-jarinya 21 dm
V = 4/3 × 22/7 × 21³
V = 4/3 × 22/7 × 9.261
V = 38.808 dm³
V = 38.808×10³ cm³
L = 4 × 22/7 × 21²
L = 4 × 22/7 × 441
L = 5.544 dm²
L = 554.400 cm²
maaf kalau ada yg salah hitung
Jawaban:
a. V = 410,66668 cm³
L = 5.544 cm²
b. V = 418,666668 cm³
c. V = 1.848 cm³
Penjelasan dengan langkah - langkah :
a. Diameter = 28 cm Jari – jari = 14 cm
b. Jari – jari = 10 cm
c. Jari - jari 21 dm
Maaf kalau salah.
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Rumus Volume Bola
Rumus Luas Permukaan Bola
Tentukan volume dan luas bola, jika :
a. diameternya 28 cm
r = 28/2
r = 14 cm
V = 4/3 × 22/7 × 14³
V = 4/3 × 22/7 × 2.744
V = 34.496/3
V = 11.498,6 cm³
L = 4 × 22/7 × 14²
L = 4 × 22/7 × 196
L = 2.464 cm²
b. jari-jarinya 10 cm
V = 4/3 × 3,14 × 10³
V = 4/3 × 3,14 × 1.000
V = 69.080/7
V = 9.868,57 cm³
L = 4 × 3,14 × 10²
L = 4 × 3,14 × 100
L = 1.256 cm²
c. jari-jarinya 21 dm
V = 4/3 × 22/7 × 21³
V = 4/3 × 22/7 × 9.261
V = 38.808 dm³
V = 38.808×10³ cm³
L = 4 × 22/7 × 21²
L = 4 × 22/7 × 441
L = 5.544 dm²
L = 554.400 cm²
maaf kalau ada yg salah hitung
Jawaban:
a. V = 410,66668 cm³
L = 5.544 cm²
b. V = 418,666668 cm³
L = 1.256 cm²
c. V = 1.848 cm³
L = 5.544 cm²
Penjelasan dengan langkah - langkah :
a. Diameter = 28 cm Jari – jari = 14 cm
b. Jari – jari = 10 cm
c. Jari - jari 21 dm
Maaf kalau salah.