Sebuah taman yang berbentuk lingkaran mempunyai panjang diameter 28m. Di taman tersebut terdapat kolam ikan yang permukaannya berbentuk persegi dengan panjang sisi 5m. Seluruh permukaan taman di luar kolam akan ditanami rumput dengan biaya Rp75.000/ m². Tentukan total biaya untuk menanam rumput tersebut!

<p>Jawaban yang tepat :</p><p>Total biaya untuk menanam rumput tersebut adalah &nbsp;<strong>Rp. 44.325.000;</strong></p><p>&nbsp;</p><p><strong>Taman&nbsp;</strong></p><ul><li>d = 28 m&nbsp;</li><li>r = 28 : 2 = 14 m</li><li>𝞹 = 22⁄7</li></ul><p><strong>Kolam</strong></p><ul><li>s = 5 m</li></ul><p><strong>Mencari luas diluar kolam</strong></p><p>&nbsp;Luas diluar kolam = Luas Taman - Luas Kolam</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (𝞹 x r²) - ( s x s)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (22⁄7 x 14 x 14) - ( 5 x 5)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 616 - 25</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 591 m²</p><p><strong>Mencari biaya rumput</strong></p><p>Biaya = Luas diluar kolam x Biaya per meter</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 591 x Rp.75.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= Rp. 44.325.000;</p><p>&nbsp;</p><p>Jadi, total biaya untuk menanam rumput tersebut adalah Rp. 44.325.000;</p>