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=2(5×3+5×2+3×2)
=41 cm³
Semoga bermanfaat ^_^
5x . 3x . 2x = 810
30 x^3 = 810
x^3 = 810/3=
x^3 = 27
x = 3
jadi p = 5(3)= 15, l = 3(3) = 9, t = 2(3) = 6
luas permukaan 2pl + 2pt + 2lt
= 2(15)(9)+2(15)(6)+2(9)(6)
=270+180+108
=558