tentukan luas dan volume balok
Jawaban:
mis : p = 9x, l = 4x, t = 3x
16x x 4= 128
64x = 128
x = 2
panjang = 9x = 9x2 = 18
lebar = 4x = 4x2 = 8
tinggi = 3x = 3x2 = 6
Luas permukaan = 2(pxl) + 2(pxt) + 2(lxt)
=2(18x8) + 2(18x6) + 2(8x6)
=288 + 256 + 96 = 640 cm²
Volume = p x l x t = 18 x 8 x 6
= 864 cm³
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