Sebuah balok dengan luas permukaan 348 cm² lebar 6 cm dan tinggi 4 cm maka panjang balok adalah?
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Penjelasan dengan langkah-langkah:
LP = 2(pl + pt + lt)
348 = 2(6p + 4p + 6.4)
348 = 2(10p + 24)
348 = 20p + 48
300 = 20p
p = 15 cm
[tex]\boxed{\colorbox{ccddff}{Answered by Danial Alf'at}}[/tex]
Luas permukaan
LP = 2 × ((p × l) + (p × t) + (l × t))
348 = 2 × ((p × 6) + (p × 4) + (6 × 4))
348 = 2 × (6p + 4p + 24)
348 = 2 × (10p + 24)
348 = (2 × 10p + 2 × 24)
348 = 20p + 48
20p = 348 - 48
20p = 300
p = 300/20
p = 15 cm