Rumus :
Luas permukaan balok :
Lp = 2 (pl + pt + lt)
Volume :
V = p × l × t
Diketahui :
Luas permukaan => Lp = 188 cm²
Lebar => l = 8 cm
Tinggi => t = 6 cm
Ditanyakan :
Panjang => p = .... ?
Jawab :
188 = 2 (p × 8 + p × 6 + 8 × 6)
188 = 2 (8p + 6p + 48)
188 = 2 (14p + 48)
188 = 28p + 96
-28p = 96 - 188
-28p = -92
28p = 92
p = 92/28
p = 23/7
p = 3 2/7
p = 3,2857
p ≈ 3,3
Jadi panjang dari balok tersebut adalah :
p = (23/7) cm = 3 2/7 cm = 3,3 cm
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Rumus :
Luas permukaan balok :
Lp = 2 (pl + pt + lt)
Volume :
V = p × l × t
Diketahui :
Luas permukaan => Lp = 188 cm²
Lebar => l = 8 cm
Tinggi => t = 6 cm
Ditanyakan :
Panjang => p = .... ?
Jawab :
Lp = 2 (pl + pt + lt)
188 = 2 (p × 8 + p × 6 + 8 × 6)
188 = 2 (8p + 6p + 48)
188 = 2 (14p + 48)
188 = 28p + 96
-28p = 96 - 188
-28p = -92
28p = 92
p = 92/28
p = 23/7
p = 3 2/7
p = 3,2857
p ≈ 3,3
Jadi panjang dari balok tersebut adalah :
p = (23/7) cm = 3 2/7 cm = 3,3 cm