Suatu kerucut mempunyai luas 1.205,76 cm³ jika jari jari alas kerucut 12 cm tentukan panjang garis pelukis kerucut tersebut

<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Lp = 1.205,76</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;π r (s + r) = 1.205,75</p><p>3,14 × 12 ( s + 12) = 1.205,76</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 37,68 (s + 12) = 1.205,76</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;s + 12 = 1.205,76 ÷ 37,68</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;s + 12 = 32</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;s = 32 - 12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; s = 20 cm</p><p>&nbsp;</p><p>Garis pelukis = 20 cm</p><p>&nbsp;</p>