Sebuah limas berada didalam kubus yang mempunyai rusuk 15 cm, sedangkan panjang alas dan tinggi limas sama dengan panjang rusuk kubus. Berapa volume kubus diluar limas?

<p>Jawaban yang tepat adalah 2.250 cm³</p><p>&nbsp;</p><p>Pembahasan :</p><p>r = 15 cm</p><p>&nbsp;</p><p>Volume kubus (V₁)</p><p>V₁ = r³</p><p>&nbsp; &nbsp; &nbsp;= 15 x 15 x 15</p><p>&nbsp; &nbsp; &nbsp;= &nbsp;3.375 cm³</p><p>&nbsp;</p><p>Volume Limas (V₂)</p><p>V₂ = 1/3 x Luas alas x tinggi limas</p><p>&nbsp; &nbsp; &nbsp; = 1/3 x r x r x r</p><p>&nbsp; &nbsp; &nbsp; = 1/3 x 15 x 15 x 15</p><p>&nbsp; &nbsp; &nbsp; = 1.125 cm³</p><p>&nbsp;</p><p>Volume kubus diluar limas = V₁ - V₂</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 3.375 - 1.125</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 2.250 cm³</p><p>&nbsp;</p>