[tex]a).panjang \: rusuk \: kubus \\ \sqrt{(luas \: permukaan \div 6)} \\ \sqrt{(2.400 \: {dm}^{2} \div 6)} \\ \sqrt{400 \: {dm}^{2} } \\ 20 \: dm \\ \\ b).volume \: kubus \\ rusuk \times rusuk \times rusuk \\ 20 \: dm \times 20 \: dm \times 20 \: dm \\ 8.000 \: {dm}^{3} [/tex]
A) √L/6
= √2.400/6
= √400/1
= √400
= √(20(20)
= √20²
= 20 DM
B) V = R³
= (20(20(20)
= (400(20)
= 8.000 DM³
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[tex]a).panjang \: rusuk \: kubus \\ \sqrt{(luas \: permukaan \div 6)} \\ \sqrt{(2.400 \: {dm}^{2} \div 6)} \\ \sqrt{400 \: {dm}^{2} } \\ 20 \: dm \\ \\ b).volume \: kubus \\ rusuk \times rusuk \times rusuk \\ 20 \: dm \times 20 \: dm \times 20 \: dm \\ 8.000 \: {dm}^{3} [/tex]
A) √L/6
= √2.400/6
= √400/1
= √400
= √(20(20)
= √20²
= 20 DM
B) V = R³
= (20(20(20)
= (400(20)
= 8.000 DM³