Alas tenda di samping berbentuk persegi dengan panjang sisi 3,6 m dan panjang rusuk tegaknya 3 m. Hitunglah volume udara di dalam tenda!

<p>Jawaban yang benar adalah 6,87 m³ &nbsp;&nbsp;</p><p>&nbsp;</p><p>Pembahasan</p><p>Tenda tersebut merupakan suatu limas dengan alas persegi.&nbsp;</p><p>Ingat rumus volume limas</p><p>V = 1/3 x luas alas x tinggi limas</p><p>&nbsp;</p><p>Untuk menentukan volume terlebih dahulu mencari tinggi alas dengan cara</p><p>AC = √AB² + BC²</p><p>&nbsp; &nbsp; &nbsp; = √(3,6)² + (3,6)²&nbsp;</p><p>&nbsp; &nbsp; &nbsp; = 3,6√2&nbsp;</p><p>AO = 1/2 AC</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 1/2 x 3,6√2</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 1,8√2</p><p>tinggi limas = TO = √TA² - AO²&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = √3² - (1,8√2)² &nbsp;&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = √9 - 6,48</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = √2,52</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1,59 m</p><p>Ingat</p><p>a/c x b = (a x b)/c</p><p>&nbsp;</p><p>V = 1/3 x luas alas x tinggi limas</p><p>&nbsp; &nbsp; = 1/3 x sisi x sisi x tinggi limas</p><p>&nbsp; &nbsp; = 1/3 x 3,6 x 3,6 x 1,59</p><p>&nbsp; &nbsp; = 20,6 / 3</p><p>&nbsp; &nbsp; = 6,87 m³ &nbsp;&nbsp;</p><p>&nbsp;</p><p>Jadi volume udara dalam tenda adalah 6,87 m³ &nbsp;&nbsp;</p>