Jawabanmu

2014-04-19T07:47:23+07:00
2(5x × 2x) + 2(2x × x) + 2(5x ×x) = 306 20x^2 + 4x^2 + 10x^2 = 306 34x^2 = 306 x^2 = 9 x = 3 p = 15 l= 6 t = 3 V = 15×6×3 = 270 cm^3
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