Tolong kak

<p>Kolam = 1/4 bagian</p><p>Rumput = 0,4 bagian</p><p>Sisanya ditanami Palawija.</p><p>Luas yang ditanami palawija = 140 m²</p><p>Ditanya :</p><p>Luas kolam?</p><p>&nbsp;</p><p>Penyelesaian :</p><p>Palawija = 1 - (1/4 + 0,4)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1 - (0,25 + 0,4)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1 - 0,65</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0,35 bagian</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 7/20 bagian</p><p>Yang ditanami palawija adalah 0,35 bagian atau 7/20 bagian</p><p>&nbsp;</p><p><strong>Mencari Luas tanah seluruhnya</strong></p><p>Misalkan luas tanah seluruhnya = L</p><p>140 = 0,35 x L</p><p>L = 140 : 0,35</p><p>&nbsp; &nbsp; = 140 : 35/100</p><p>&nbsp; &nbsp; = 140 x 100/35</p><p>&nbsp; &nbsp; = 14.000/35</p><p>&nbsp; &nbsp; = 400 m²</p><p>Luas Kolam = 1/4 x L</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1/4 x 400</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 100 m²</p><p>&nbsp;</p><p><i>atau dengan cara :</i></p><p>Luas kolam/Luas palawija = Bagian kolam/Bagian palawija</p><p>Luas kolan / 140 = 1⁄4 /7⁄20</p><p>Luas kolan / 140 = 5/7</p><p>Luas kolam = (140 x 5)/7</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 700/7</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 100 m²</p><p>&nbsp;</p><p>Jawaban : D</p>