Rumus serta Jawabannya

<p>Volume bangunan = volume kerucut + volume tabung</p><p><strong>1. Mencari volume kerucut</strong></p><p>Volume kerucut = 1/3 × 𝞹 × r² × t</p><p>Tinggi kerucut = Tinggi bangunan – tinggi tabung</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 30 – 18 = 12</p><p>r = jari-jari = jari-jari tabung= jari-jari kerucut</p><p>Diketahui di soal adalah diameter tabung</p><p>r= diameter÷2</p><p>r= 10÷2 =5</p><p>𝞹 menggunakan 3,14</p><p>Subtitusi 𝞹= 3,14 &nbsp; &nbsp; &nbsp;r= 5 &nbsp; &nbsp; &nbsp; &nbsp;t= 12</p><p>Volume kerucut = 1/3 × 𝞹 × r² × t</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1/3 × 3,14 × 5² × 12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 314</p><p><strong>2. Mencari volume tabung</strong></p><p>Substitusi 𝞹= 3,14 &nbsp; &nbsp; &nbsp; &nbsp; r= 5 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; t tabung= 18</p><p>Volume tabung = 𝞹 × r² × t</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 3,14 × 5² × 18</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1413</p><p><strong>3. Jumlahkan</strong></p><p>Jumlahkan volume kerucut dan volume tabung</p><p>Volume kerucut = 314</p><p>Volume tabung &nbsp;= 1413</p><p>Volume bangunan = volume kerucut + volume tabung</p><p>Volume bangunan = 314 + 1413</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1727</p><p>b. 1727 cm³</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p><p>&nbsp;</p>