diketahui balok, P : L : T = 7 : 4 : 5 jika L = 2656 cm2, maka carilah volumenya
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Jawab:
Penjelasan dengan langkah-langkah:
2 (7x)(4x) + 2 (7x)(5x) + 2 (4x)(5x) = 2656
28x^2 + 35x^2 + 20x^2 = 2656/2
83x^2 = 1328
x^2 = 1328/83
x^2 = 16
x = 4
panjang = 7(4) = 28 cm
lebar = 4(4) = 16 cm
tinggi = 5(4) = 20 cm
volume = 28 x 16 x 20 = 8.960 cm^3