Rusuk kubus = 15 cm

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Tentukan
• Volume
• Luas permukaan
• Keliling
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Rusuk kubus = 15 cm

SOAL 1

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V = r × r × r

V = 15 × 15 × 15

V = 225 × 15

V = 3.375 cm³

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Lp = 6 × r²

Lp = 6 × 15²

Lp = 6 × 225

Lp = 1.350 cm²

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K = 12 × r

K = 12 × 15

K = 180 cm

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Volume = 3.375 cm³

Luas permukaan = 1.350 cm²

Keliling = 180 cm

Penjelasan dengan langkah-langkah:

Diketahui:

  • r = 15 cm

Ditanya:

  • Volume, luas permukaan, keliling = … ?

Jawab:

VOLUME

  • V = r × r × r
  • V = 15 × 15 × 15
  • V = 15 × 225
  • V = 3.375 cm³

LUAS PERMUKAAN

  • Lp = 6 × r × r
  • Lp = 6 × 15 × 15
  • Lp = 6 × 225
  • Lp = 1.350 cm²

KELILING

  • K = 12 × r
  • K = 12 × 15
  • K = 180 cm

Kesimpulan:

Jadi, V = 3.375 cm³ Lp = 1.350 cm² K = 180 cm

Detail jawaban

  • Kelas : 8
  • Mapel : Matematika
  • Bab : 3
  • Materi : Bagun Ruang Sisi Datar
  • Kode soal : 2
  • Kode kategorisasi : 8.2.3
  • Kata kunci : Luas permukaan, volume, keliling kubus.